Wouldn't you keeping the propane cans where you sleep keep them warm enough to still work? If not, you could put the little propanes in an old sleeping bag or something. I've been in a pop up camper where all water and such froze but was still able to light the propane stove to heat up water/snow to pour into the drains.Thats a good thought, and definitely a solution to one of my problems, but I still have to worry about extreme cold.