Ur going to have a tough time on that one, cause the land got so valuable in that area a few years back the ol developer wiped out anything decent that is close in.
This would be a really good option that would be close, and in a very neat area to explore as well. Not too many people know about this particular park or that it even has rv sites. This should be a good location for getting to your event as well.
Cave Creek Park
This park is located in a very "rural residential" area with a lot of expensive custom homes and horse properties, but the park is set in by itself. I'm not familiar with whether they take reservations.
Hope this helps....