I've done a lot of backpacking and camping but most of my backpacking trips were short enough that I wasn't going to lose much weight so I wore shorts or pants that did not require a belt because the hip pads could cause wear. Now that I'm planning on doing 2,000 miles of the trail I'm sure to lose weight and I'm wondering what others have used to hold their pants up. Maybe just buy new pants with a smaller waist?? Just wondering.