We simply don't travel that weekend. Or most other "holiday" weekends for that matter. BTDT, and almost every time was a complete disaster. It's just no fun when a park is absolutely full (or more). So we use holiday weekends to hang out at home with other family and friends; most of them don't RV anyway, so it works out well for us.
I agree with others though, our hobby is growing rapidly. And like many other things that grow rapidly, the ancillary supply of goods and services are not keeping up. It's similar for RV dealer service departments as well, too much demand, not enough supply.
So, like many other things in our life, we make an effort to go camping when demand is relatively low. Last weekend we stayed in a park that had a few dozen spots, and there were probably less than a dozen guests. It was GREAT. Nice and peaceful.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!