I built some stools out of 1 in square tubing, weld a flat piece with holes drilled in it to screw into padded seat made from plywood,foam, and vinyl. light weight, it is one legged and has a sharpened piece of 5/16 round bar and big washer on bottom side. you can stick it in ground next to tree and set comfortably. I have bum leg and usually try and set, not quite standing. I tie an old nylon tie down to it for a sling and pack it with me. I have given away all of the ones I had but am going to fab a new one as soon as I get wire for my welder. I will post pics.
LarryDawg