Best RV Resort or Campground

OK, forgive me if this has been covered. I did a search and didn't see a thread. I'm thinking toward retirement in a few years and I want to start building a list of must see places. I've been working on a list of places based on scenery, local culture, or just places the wife and I have been wanting to see, but I thought it would be nice to start compiling a list of places where the RV park itself is a destination worth visiting. So if you have a place in mind, post some thoughts on what makes it special.

To start it off, although I'm a long time RV owner, I don't have a lot of experience with RV resorts. We've stayed in a lot of campgrounds, but most of them are nothing I would call special. Some better than others, but most have just been a place to park the RV. There are a couple of standouts though.

I believe the best I've seen is Cherry Hill just outside of Washington DC. It's a large resort that offers some real amenities and scheduled activities. We only stayed a few days and unfortunately we didn't get to see or take advantage of many of those activities. One nice feature that we did take advantage of was a DC night tour that picks up and returns to the park. We were also able to buy DC metro subway passes right in the park. It's a beautiful park and I hope we get to return and spend some time enjoying the activities at the park.