Stephen, there are several ways of making some type of bread on the trail. They usually involve extra weight.
Pancakes are perhaps the easiest. I just pack bisquik in a baggie. I add a couple tablespoons of the mix to my cup, a teaspoon or so of olive oil, with a couple tablespoons of water and mix. I pour this into a heated flat sheet greased with olive oil *just* before I pour. I then wait for it to bubble, and carefully lift it off the sheet with my spoon and flip it. I have used bacon grease to make flour gravy, or, squirt parified butter on it, cinnamon, etc. roll it up and eat. You can use these for sandwitches for lunch, too.
The extra weight is the weight of a small fry pan. BTW: These are one at a time though many, variations.
Fried dough is another. I start off with a half pound of pizza dough off the shelf. I make two or three fried dough patties, then add a couple ounces of flour and a couple ounces of water with a single dash of salt. I kneed it around with existing dough. Done. Easy right?
Well, no. It takes 24-48 hours to regenerate. 24 hours with some kneeding if the temp is around 80F or so. 48 hours if it is around 60F. At 40F, it will take 4 days. You have to supply a non-sealed container. A baggie will pop open and make a mess. Don't ask how I know. It will double or quadruple in size, mostly because of fermenting. It *can* spoil, leaving it with a nasty taste. Usually hiking will be enough to keep it "patted" down though.
The yeast is living (though sometimes it will die or grow slowly making tomorrows dough balls pasty, hard and flat. It needs to sit longer.) You gave it food and water. It produces a rather large amount of CO2 and alcohol while metabolizing the sugars/starches. I have done it for 5 days, but it gets increasingly floury since I was using it too fast. The dough can be kept for about a week or so, hence the "sour" dough name. It will smell strongly of fermented alcohol/vinegar at the end of a week or so. It is still good, of course. The yeast will lie dormant for a few months. So simply cooking the old dough and adding fresh flour/water will rejuvinate it…sour dough bread, muffins, rolls, etc. I am always too impatiient to wait.
I have simply used bisquik to make fried dough, instead. I add a small amount of water and make a thick doughy "ball." It sits for about 15 minutes then I fry it. The baking soda adds a lot of salt, though. And with little gluten and no yeast, it tasts more like a fried biscut than bread.
Bisquik has other uses. Gravy (as I mentioned), thickener for stews, dumplings, pot-pies/shepherds pies.