All camps receive guests at night?

We often stay in a park that doesn't allow check-ins after 9PM. They call all arriving guests to check on their arrival times starting about 4PM in the afternoon. If a guest isn't going to make it, they tell them to hold up and cancel their reservation for that day (and they don't charge for that day). I asked them why they did that, since it would obviously cost them some money, and they told me that their primary consideration are the guests who are in the park. They would much rather lose a night's rent on a site than have an arrival at midnight that disturbs large numbers of guests. Got to admit, I really appreciate not having someone pull in at 1 AM and spend the next two hours idling their rigs, shouting directions to goodness knows who as to where to put the barbeque grill, kids slamming doors and all the other assorted noises that some people make when all they should be doing is pulling in, turning everything off and going to bed. I agree with the others, if you are still on the road late at night, do the Wal-mart or the truck stop or the rest stop.