I didn't realize that Cliff Castle has a full-hookup RV park. I just received an email from casino management with the following information:
"Our RV Park, Distant Drums, is located just over the interstate from us, and we have a free 24-hour shuttle to the casino from the park."
This appears to be a very "family friendly" location for casino camping. In reviewing this casino and RV park I noticed there are many nearby attractions; state and national parks, historic sites, etc. and the casino features a Kids Quest, a bowling alley and a large arcade.