Still looking for my copy of "The Lords of Discipline" to pull that graph about Charleston, S.C.
In the meantime, with the weather warming up, my thoughts wander to the Len Foote Hike Inn, located in north Georgia. If you're a guest, it's accessible only by foot (as the name suggests).
Went up there solo about eight years ago and had a marvelous time. A cross between sleeping on the ground and a Holiday Inn, the Inn has no TVs and doesn't allow cell phones. That fact alone is worth the trip.
If you go, or have been, let me know.