primitive, have you looked at the therma-rest luxuryLite cot? After reading some of Larry Bartlets comments on his, I went looking for one and found them at a decent sale price at Sierra Outdoors. They have a way of setting them up with fewer cross pieces at each end that keep the weight below the 2 lbs 12 oz for the regular size. They do keep you close to the ground and make a huge amount of squeeking when getting in and out, but for a back problem they are the bomb.