I asked on the wacken forum and a few said people do bring campers but there is no hookup so a generator is needed. I emailed a few camper companies but since it is peak season there is a minimum of 14 day rental for all campers. Its great to start early so I dont have to rush in my planning. I wouldnt mind camping but worried about the sleep aspect and going to the bathroom and I dont think my wife would want to wander around in the middle of the night looking for the bathroom.
Will find some hotels that are close and take a taxi back in forth. I think I saw on the map there is a taxi stand there.