The "no wheels" is a usual requirement for just wilderness areas within NF, not all NF lands. It means exactly that: no wheels or mechanization of any kind at all, including carts. I don't know what they do about wheelchairs, but I do know that, as of now, wilderness areas are exempt from ADA so you couldn't get one in there anyway. When we do trail work in wilderness areas, we use a hundred year-old crosscut saw instead of a chainsaw. As long as you have a little training, it is amazing how fast it cuts.