Thanks for the info. Big Agnes looks very promising. I found a memory foam thing that they make to go around their pads when I looked them up, and it looks like the pad and foam combo still comes in just under 5 pounds, so that's do-able. That could be really good for him. Don't know til we try, of course.

I know he doesn't like sleeping on hammocks. Hadn't thought about setting one up as a chair. I'll see if that might work for him.