The $3/night may be a bed tax imposed by the city and/or county, like the $.50/night charge that Pima county, AZ, has had for years. By showing it as a separate item, the campground is calling attention to the fact that it's not they that's charging it, but the government.
Bed taxes have been quite common in the hotel/motel business for a long time. Just another way to insure the visitors leave some money behind.
Bed taxes have been quite common in the hotel/motel business for a long time. Just another way to insure the visitors leave some money behind.