I worked as security at a very popular resort in Wisconsin Dells. Extremely rude customers are not only found in campgrounds. We dealt with loud parties, smoking many substances and people threatening us with physical injury. Our advantage over most campgrounds was that we had cameras everywhere, over 600 cameras that we could bring up for the police.
We would ask people to obay the rules ONCE. After that, we would inform them that they had to leave. If they gave us a hard time about it, we walked away and they would taunt us with insults and say that we were weak for walking away. About 20 minutes later I would knock on the door ands they were escorted off the property by the police.
I hope that campgrounds would get similar help from the police if they had problems.
And yes, some people (usually drunks) would get physical when we asked them the first time to quiet down. They got to go to jail and their group got evicted. I am retired law enforcement and most of the other security officers were either retired or active duty cops. We had a great security force.