Not entirely made in the bush, but using resources from there.
I used my folding saw to cut the wood, then my new hand auger from Wish to make the hole. Morakniv Companion black knife to help carve out the peg, then a lot of sandpaper and filing to make it fit (+ help from another log to bash it in).
I used a power drill to make the holes for the hooks because I'm not sure how else to go about that.
