Back in my day, we camped quiet like. Didn't never make a peep after 7pm. Any of those whipper snappers making too much noise would be taken out back behind the woodshed and given a good switch till they saw things right...We also pulled the camper by hand, uphill both ways...
....Sorry I was channeling my crotchety old man persona for a minute.
None of this is new. Possibly you are seeing different types of campgrounds and during different time periods as a full timer. Also, as a full timer, a holiday weekend is just another day...other than it's busy and noisy. Back when you were part of the weekend crowd, everything was new and different.
I know as a kid 40yr ago rangers going around telling people to quiet it down.