Making simple mocotaugans (crooked knives) in the campfire. It doesn’t take a bunch of infrastructure to make a functional knife. I used to believe it did, but now have 20 years of making simple knives in the campfire under my belt. Vise grips and a hammer are necessary, as is a new file to cut the bevel and an old file to become a blade. Something to hammer on is a plus, but you can use a stump if you have to.