What do you carry to sleep on? I usually end up sleeping on my side and a blue foam pad just doesn't do it anymore. For car camping I have started using a cheap beach air mattress topped with that blue foam pad to soften the 'tubeness', stuffed into an old flannel bag liner to hold them together. This gives enough depth for my hips, but is cumbersome to set up, and potentially too fragile for backpacking. The thought of carrying a couple of pounds for a 'luxury' self inflating pad is daunting.