camping policy at national parks

Most campgrounds we have stayed in, private, state, or National Parks all says one RV per sight. Some say two vehicles which they are meaning a toad or separate car or truck. Your two truck campers is considered a camper (RV) just as two class B or camper vans would be. This goes back to common sense. Now I will say a lot of state parks have double camping sights for families or friends traveling together. They can camp side by side, but each of you have to pay for a separate sight even though they are together because thy are separate sights and hookups. Campers get no specials on tent sights weather you pay for a hookup or not. Some do let a RV and a tent stay on the same sights. Just my 2 cents.