I carry a space blanket type "tarp", which is generally going to be okay, even if the plane isn't usable. And, that lives in my gear bag in the back of the plane, not on my person.
Someone earlier mentioned they keep a sleeping bag in the plane in winter..... Depending on where you fly, you probably should carry some kind of sleeping bag with you ALL year. I've camped in the mountains (at not really high elevation) in mid July, and slept in a winter sleeping bag, and was very comfortable. And, I'm a warm sleeper.
I totally agree with Hammer reference lifeboat matches....they work when wet, and they burn with a great flame for a long time. I carry at least one tube of them on my person, and two packets of the BIG ones in my gear pack in the baggage.
I also carry a butane lighter on my person....and a Blast Match (look it up--great tool) as well.
MTV
