Many Campgrounds use Signs and Bulletin Boards to communicate Campground Etiquette.
The quality and consistency of these signs sometimes varies from campground to campground. Some are excellent. Some are probably inadequate for people to become educated on campground etiquette consistently.
Some excellent examples are found on the link below.
http://picasaweb.google.com/GD.8900/CamperPhotosStateParkCommunications#