It occurs to me that I've overlooked the obvious.
Why not use a wood stove with ISO butane?
The speed, heat and immediacy of ISO butane stove with the longevity and endless fuel source of a wood stove.
Use scenarios
1) wood stove as primary stove, ISO as backup
In this case you'd just use the ISO butane in scenarios where no wood fires are allowed, no wood is available, enclosed spaces, you need to cook / boil water in a hurry or as an emergency heat source. I.E. if you fall in cold water.
2) ISO as main stove, wood as backup.
I don't see much point in this scenario, wood stoves are to bulky and heavy to carry around simply to use simply as a backup. Indeed if your ISO butane ran out and you truly need a fire… i.e. in a true emergency you can always light a traditional campfire just as well as you can light a wood gas stove.
3) Urgent wood fire
In order to not waste ISO butane you could just use it if you need an immediate wood fire (i.e. in an emergency, wet wood, just pressed for time, i.e. breakfast or lunch).
In this case you could use the ISO butane to do a fast light of your wood stove. (Think of it as your butane lighter on steroids.) You could probably get a pot on to boil in just a minute or two, even with soaking wet wood.
I must admit I much like this scenario.
Though I wouldn't much trust ISO butane for winter travel it sounds like a superb rival to traveling with a wood and alcohol stove in the summer.
In comparing the two the ISO butane stove may way a hare more then alcohol stove but the fuel for the ISO will way about the same or less (4oz canister vs. 4oz bottle of alcohol) and last a huge magnitude longer. 4oz of ISO butane could last perhaps a hundred times longer then four ounces of alcohol. (Anyone have any stats?)
Personal use scenario.
I could picture getting in late to camp (as I'm sometimes prone to do since I love going late into the evening and love the night) and being to exhausted to handle the complexities and patience of wood fires and fire lighting.
In this case I could see not having to find kindling or fiddle with fire lighting as a huge blessing.
I could simply use the ISO butane to light whatever wood fuel I first got my hands on. No fuss, no stress, would work 100% every time… if any trouble I could always just cook on the ISO stove.
== Cons of wood + ISO butane ==
So, I mentioned above comparative cons to the wood gas / alcohol stove combination.
Can't think of many others.
1) ISO cartridges are still hard to find
When your ISO butane cartridge is spent it's still spent, but by using primarily wood you could probably manage your ISO butane fuel extremely effectively. One 4oz canister could last you weeks. Certainly enough time to give you the chance to strategically use the source until opportunity afforded you the possibility of finding a place to buy a new cartridge.
That's not really so much of a con of the combination of wood and ISO butane so much as a huge mitigation of the one major drawback to ISO butane. Indeed if anything it shows a remarkable advantage over ISO butane in place of alcohol.
2) Second, as mentioned ISO does work poorly in the cold.
3) Lighting a wood gas stove with ISO butane requires experience / skill / technique
Again, this isn't really a con. Anything that requires a little experience, skill and technique should be considered an opportunity.
Even if you do only want to do this in emergency, it's best to master the skill before you need it.
You can't just stick an ISO butane into the top of a wood gas stove to light it (unless you want it to explode in your face.) Nor can you hold most wood gas stoves over an ISO butane stove (unless you want to burn yourself.)
However I think you could get at bundle (a nice full handful) of approximately eight to ten inch sticks and twigs and light the ends in manageable groups over the ISO stove before dropping them lit in first into the wood stove. In this manner I think you could have a fire lit in minutes from the time you pulled out your stove including time now negligent time needed for gathering wood fuel.
== something old, something new: why the dual approach rules ==
In summary… darn, I do write to much but this thread is absolutely right on the money for me because it speaks of both the versatility and dependability of fire building methods over the years.
It doesn't matter which combination you use they're all winners. Way to go lighter without loosing flexibility.
I find this dual stove approach fascinating in comparison to traditional bushcraft. It's a paradigm shift in many ways but some values remain the same while new values such as leave no trace and sustainability have been incorporated.
The bushcraft way:
1) open fire lit with flint and steel
2) open fire lit with a waterproof match or "modern" lighter
The UL backpacker way:
1) a wood gassification stove
2) a side jet alcohol stove or ISO butane stove
The similarities and comparisons are numerous.
The dominant overarching idea is that while the technologies have changed to reflect the greater need for low impact camping while the primal needs of reliability and survival are still met.
Specifically:
1) a wood gassification stove does not negate one's needs to know how to build a fire, in fact it supports and enhances the experience / knowledge and skill to carry forward this ancient and primal survival need.
2) a wood gassification stove is extremely dependable piece of technology and if you want wood fire necessary for low impact / no trace camping. However in an emergency one can always fall back on a good old campfire. It is the "flint and steel" of backpacking stoves.
3) an alcohol or ISO butane stove in this use scenario is part of the historic dependable one two punch of modern and convenient technology and age old and reliable methods. It is if you will the "modern lighter" of wood stoves.
Used alone the alcohol stove and ISO butane divorce themselves from history and the primal skills necessary for survival. While uber efficient and convenient if broken they could leave the user at a dead end as they do not incorporate the primal survival skills into their use.
Even though some of you are saying "well I already know how to light a fire with flint and steel". I remind you that you can never be to practiced at it since environmental conditions are infinite an varied.
Fire lighting is as most skills are only good in so far as you continue to use and develop them. In this way modern backpackers cannot completely divorce themselves from the history of bushcraft. At the very least there is some remote possibility we could need these honed skills to save our lives.
In fact, "remote possibility" is being to nice. When backpacking we're always exposed to the possibilities of freak weather storms, getting lost, encounters with wild animals or some challenge of varying degree. For some it's a large part of what backpacking is about.
It isn't all about the pretty scenery and I wonder if sometimes this is what people experience when they say "it wasn't what I thought it would be". Adversity is possibly inherent in UL backpacking.
Anyway, when these new technologies (the latest ISO butane and alcohol stoves) are used in tandem with a modern ultralight backpacking wood stove these new stoves give us both modern convenience, the security of redundancy (i.e. lighting a fire in the pouring rain) with a fine respect and connection to historical ways.
As neither we in our knowledge and skills nor our gear are perfect by having a little redundancy we can perhaps pay respect to and carry forward this evolutionary narrative. The gear isn't everything but in many cases it speaks more then the photos, texts and books that chronicle it.
This is yet another facet I love of modern sports like UL backpacking, pack rafting, ultra endurance running and cycling.
One last last twist.
You could always just light fires where and when fire rings are provided to keep that historic connection… but once again the dogma (bigger, better cheaper) has run headlong into a culdesac of thought and broken the lineage with history. As pretty much any backpacker on this site will agree our greed for large fires like in other areas of society has caused the majority of camp sites across the nation to become brushed out.
Meanwhile the spread of non indigenous parasites like the long-horned beetle which tends to get spread by campers in cars carrying firewood from place to place is yet another assault.
Hence we come back to the modern UL backpacking wood stove. It is a call for modesty, a new approach, or rather old approaches revisited and revitalized.
Respect of the environment.
Leave no trace.
Take only what you need while leaving plenty for future generations.
I am reminded of where these axioms came from as well as the old native American accounts… something about Europeans always feeling the need to build large fires.
Why this was can only be speculated.
Perhaps it was out of fear or perhaps for warmth, but now that we've thoroughly "conquered" nature and have little to fear maybe it's time to use our "cutting edge" merino wool, polypro, synthetics, down bags, get smart about leaving food out and cooking mess, carry some bear mace if we're not sure of our capabilities, and leave the big fires largely to history while keeping the traditions and skills alive by telling stories over our modern campfires which we have the possibility of sustaining for future generations while keeping the core skill alive.
Damit. Got carried away again. :)
Peace.