I joined the Marines the week I turned 17, and that led to a few experiences that might qualify as adventure - eye of the beholder.
I know people who have, until recently, lived with dirt floors. There are people who live way back off the grid, without electricity. Not a whole lot, but quite a few. That's a choice for a lot of them. There might be a religious element in their isolation, at least with some of them.
I realized there might be monetary or financial reasons to jump in and write a 'Winter's Bone Retriumphs' or something, and nobody would object to me doing that in publishing. But it would be a waste of my time, and they always take a little longer than you thought they would take.