Pad Options for Cowboy Camping on Sierra Granite at 20 Degrees F
In one month I'm going on a 5-day trip into the High Sierra where I hope to sleep under the stars every night. I'm willing to carry the extra weight so that I can bed down comfortably on a granite slab, but do I need too? In other words, can I make foam work or am I stuck with a fragile, expensive, lightweight air mattress? Here are the two options I'm considering.

Air Mat Option – Exped SynMat UL 7 20" x 72"(16.1 oz, $155) with associated stuff sack (0.3 oz) and patch kit (0.7 oz), Tenacious Tape (0.6 oz, $4.50) for more patching security, Montbell pillow (2.4 oz, $29), and Suluk46 1/8" x 24" x 72" pad (2.1 oz, no longer available) to protect the bottom of the air mat.

Foam Mat Option – Nunatak Luna Pad 19.5" x 72" (11.0 oz, $45), Gossamer Gear Nightlight Torso Pad 18" x 18.5" (2.3 oz, $21), and Montbell Pillow (2.4 oz, $29).
Here's the juxtaposition in my order of importance:
Comfort – To create a depression for my hip (I'm a side sleeper), I cut one of the three sections off of a Gossamer Gear Torso pad and positioned it so it supports me from shoulders to lower back. The amount of comfort that this 2.3 oz addition adds is astonishing and puts the foam option on par with the air mattress in terms of comfort. However, note that I have not tested this foam configuration in the field yet and I've never been a huge fan of air mats with respect to comfort.
Durability – Foam wins hands down. I believe that today's lightweight air mattresses are in a similar position to the ultra light packs of 5 years ago; even if you exercise the upmost caution their materials are too fragile for long term use.
Ease of Use – Nothing is simpler than rolling out the foam pad. Although some complain about the effort required to blow up an air mat and also worry about trapping moisture inside, neither of these bother me.
Packing – The air mat packs smaller but needs to be deflated, rolled, and stuffed. You also need to bring something to protect the bottom and keep track of patching kits. I don't like the aesthetic of the giant, rolled foam pad stuck on my pack but I don't have to look at it, at least while walking, and during breaks I can sit or lie on it.
Cost – The air and foam sums are $188.50 and $95 respectively where the prices are from a Google query on 4 June 2012 and don't include tax or shipping. The air mat option doesn't include the cost of the Suluk46 thin foam pad since he doesn't sell them any longer. Gossamer sells similar 1/8-inch-thick pads in two widths but annoyingly they are only 60" long.
Weight – 22.2 and 15.7 ounces for air and foam respectively.
Thoughts?






