Thanks for the reply. I'm not hung up on the length, but of course we are counting ounces and ideally we want to avoid carrying length that she doesn't need. We went to REI and tried out a bunch of pads. The trekker seemed like it would be good. And then she was unable to sleep on it through a night without pain in her hips. Playing wth letting some air out is a great tip, I didt think of that as I love a firm pad. I think that and some strategically placed foam is the next step. Though which foam and where to place it is the challenge. Thanks for the reply.