We hiked the First Creek Loop Trail at Mammoth Cave National Park and backcountry camped. The campiste itself was okay. There was a fire pit and log to sit on. There were plenty of trees to hang a hammock. There was a water source, but the park ranger didn't really recommend getting and filtering water from it, and once we arrived, we could see why. You would have a difficult time actually getting down to the water as there was no real clearing or way to it. The also was a very thick, green sludge film on top of the water. So we carried in what we would need for our overnight. The campsite was decent size and away from any others, so it was nice an quiet. We did have to take a very short ferry ride in our car to get across the water.