Richard from DC on 7/19/2017 8:04:57 PM:
The marked campsites, on Google maps, are big areas with ample room to camp depending on how close you and your neighbors want to be. Homeless people tend to camp around DC at least. You can camp anywhere, you just may not have restrooms or water. I have never walked it, but I walk at nearly a 3.5 mph pace, so depending on how long I want to walk in a day, I could do it in two or three days. I am not aware of anyone you can call, but you'll have lots of company with bikers. It's buggy and muggy at this time of year, so be prepared.