Well, if there are people using the place, I'd say they're more likely to be hermitic squatters than homeless drifters.
I do remember reading an article about a "sport" called something like extreme freestyle hiking. They can be on the trail for months, often alone. Some prefer to avoid others totally and live off the land. There were a few stories about hikers taking "liberties" for a place to sleep or something to eat, like letting themselves in barns, shed, abandoned homes, etc. You'd think these folks would have maps/GPS data sharing of isolated places to bed down, certainly something more advanced than hobo symbology.
