I love this forum for the great info on DIY. I never would have thought to be more creative with my equipment, I guess I've been kind of "store-bound."
I used a prolite pad for about 8 years before I started to have real issues with it leaking/springing leaks. After it deflated on a snow camp I cashed it in, but I replaced it with a Z-lite pad and I'm very happy with it. I just stuff extra clothes under me if needed. Fortunately, I sleep well on the pad, even better than in a normal bed, where I get the firmest mattress I can.