Ha, sounds like this annual festival thing that HS friends of mine throw in my hometown... the one kid's uncle owns a huge campground, so they rent it out for a weekend and have live music, vendors, bonfires, hula-hooping (it's actually cooler than it sounds)... it's pretty neat.
A guy that used to DJ at a couple clubs I used to frequent throws it every year at his wife's parents camp. I've known him for like 10 years. I used to hook him up with new music to spin. They usually do the bonfire thing, and boating, the lake is rocky so its hard to swim. Usually have beer pong.