You need a fishing license to catch the crawdads. After paying at the gate of the state park, drive straight down to the boat ramp. You'll see a trail going left at the edge of the guard rail. This trail goes about 50-60 feet to a small bay. Gear up at the flat area, then cruise around the bay.
Crawdads are out in the open on the silty bottom, along with small minnows and smallmouth bass.
Across from the boat ramp at the state park, you'll see an overhanging cavern. Many striped bass hang around in the shadows inside the cavern at around 15 feet. The cavern is very interesting, very large and can be disorienting if you get back into it. The ceiling has some small air pockets just large enough to bring your head out of the water. The cavern ceiling drops down very low in back for an extended period.