We've stayed in a couple of them from time to time, e.g. Hilton Head in North Carolina and The Great Outdoors in Florida. We find the parks quite pleasant and the people as warm & friendly as RVers anywhere. Just operating on a somewhat higher plane. Pricey to be sure, but the level of maintenance and amenities are commensurate.
The parks typically aren't just open lawns with paved driveways. Many have nicely landscaped & wooded sites that are isolated from each other. People walk around or ride golf carts, stop and chat, etc.
I've attached a photo of a site we borrowed for awhile at Hilton Head Motorcoach Resort.