Do you like hiking? There's a trail behind the lake that goes to the overlooks. Bringa machete, lol.
Do you like beer? There's a brewery in town- Blackwater Brewery. Get a Gruller and go back to camp and enjoy the evening fire.
You can rent rowboats or paddle boats and putz around the little lake if you want.
The park offers some nice activities too. One year we went on a fern walk and learned a lot about the native ferns. Very cool walk.
If you have kids, the nature center does a lot for them. Our kids love it there.
Take a day trip over to Cannan Valley- take in the sights over there.
When we go, we never run out of things to do, but my all time favorite pastime there is this-