the best dryland camp on the east you can go to is the freestyle america tramp camp. to see some footage of the camp, peep this: http://media.nscdn.com/uploads/member/videos/1156080114camp.mov
the rail setup is better now than in the video. it has the same box and rail, but has a better surface, snowflex maybe? the camp also has 3 other olympic tramps besides the one in the video, and one of those is inside, so you can jump at night or in the rain.
im actually at the camp right now setting it all up before the camp starts. if you have any questions you can ask me. for more info or to sign up go to http://www.freestyleamerica.com/tramp.htm