local hangout/know where to look
The area is mostly a hangout for fishers and locals. There's a loading dock and small piers, and a couple of lawns with some campfire rings and places to set up a tent. Fishers and boaters were loud, and we were there on a Tuesday. Dozens of kids came to hang out on a bridge above the water, jumping off the bridge occasionally, and making quite a commotion. No alcohol is allowed but they clearly had coolers full of beer. You are also not allowed to swim. I was surprised park services didn't shoo them away.
However, if you follow the trail to the right over the bridge and around the lake, there is a wonderful path through the preserve. It is especially nice to walk around sunset. There are some sites, only a minute or two walk, on the water along this path. If you continue down the path for about 10 minutes, to the right, under a canopy of trees, was a neat secluded "campsite". There were probably more of these hidden gems down this way, along the quieter side of the lake. It's a decent walk from the car, so we stayed at one of the closer spots along the water. All of the sites had LOTS of trash. So sad to witness all the locals throwing their bottles everywhere, very careless people in this area.
Boats stayed out on the water well after dark. All in all it was not peaceful, but at night the fireflies were amazing, and it was truly the most diverse symphony of bird calls I have ever woken up to.