It's obviously wise to reserve in advance when going to our country's popular destinations during the height of their seasons, but RVing among a throng of people has grown less attractive over the years for us. Even so, it seems we subject ourselves to this madness at least a couple times a year.
When RVing, we make every effort to avoid using private parks, particularly under these circumstances. We much prefer state, COE, county, city, and federal campgrounds, unfortunately this is not always feasible. Private parks are OK when we will be out and about using our rig just to sleep in.
One of the things we like about state, COE, and similar parks in our region is that they maintain a certain number of sites that can not be reserved in advance. If we are in the mood for a helter skelter type of RVing experience, we can arrive a few days early and secure a spot even on major holiday weekends.