Makes sense if you have that many mattress. People forget that the primary purpose of a mattress is not to make a soft spot to sleep but to insulate the warm body from the cold ground. Unfortunately, I have only the one mattress. But my bed can be rearranged to change the height. I could set it as high as possible (about three feet), put my mattress on the floor and drape the whole thing with blankets and sleep in my sleeping bag. Should keep me warm enough, especially if I can find someone to share it with <img src="/images/graemlins/wink.gif" alt="" />.
I've often felt that the prime survival skill was the ability to improvise.