Alot of good recommendations here. I'm in North Central Wisconsin if that helps. It's about a 20% chance that the ground will be frozen solid. At the very least it will probably be quite damp. That's why I thought of the foil/bubble stuff, seeing it's waterproof. At least until I puncture it.
Money isn't really an issue here, just weight, bulk and comfort. I don't mind paying for the good stuff.