Great lake for swimming and water play. Too warm for trout and too small for kayaks/SUPs. But it does make a beautiful backdrop. 
The park is rather spread out, so a bicycle/ebike is a plus. And if you mountain bike, there's some decent trails close by to ride. There's also legit fishing lakes within about a 20 minute radius. 
RV sites are mostly electric and water only, and many aren't anywhere near level. Nonetheless, I loved the place and will definitely go back. If you prefer parking lot RV parks though, go somewhere else.