Indian Acres is a well known seasonal campground around this area, most of all it is a PRIVATE campground. All of the sites are deeded and they are zoned for seasonal use only (cannot establish a residence there.)
Now they have a LOT of deeded lots, but since those around your site are the same people you would probably let your gaurd down over time even if you normal supervised your children in other campgrounds. I notice in many campgrounds that the kids that see the least supervision seem to be be with the seasonal RV sites, the rest I reserve comment on since I was one the kids that by 8 and 10 years old did not require supervision 24x7x365.