I tent camped here alone around spring 2012 and laid under the stars on one of the concrete pads next to the visitor center because the private spots were occupied. The next morning I hiked a trail along a western ridge and then bushwacked back down. It was cloudy and lonely but pretty county with live oaks, junipers, sage, and limestone. It felt like a donated ranch and I think the ranch family retains the right to exclusive use sometimes. I spelunked the pristine cavern on a different, guided trip with my family after needing to make reservations a couple months in advance. Then we spent a couple days housesitting on nearby Ft. Clark, swimming in the spring fed pool and playing golf. Fun time.
I camped here with my granddaughters and had a wonderful time. This is a small park that is centered around two main attractions. First is the actual cavern. Kickapoo Cavern is a moderate size cavern and completely undeveloped. The park staff conducts a hard hat and flashlight tour once a week, so reservations are a must. Next is the Stuart Bat Cave. About 1 million Mexican Free-tail Bats exit the cave at sunset to search for food. The viewing area is very nice and handicap accessible. You can also watch them return, which is quite impressive, if you get there before sunrise. Also there are many hiking trails to occupy the rest of your time.
The park has several campsites with full hookups. There is a dump station and fires are allowed in fire rings. Be sure to check the park website because the bats are seasonal and the park may not be open 7 days a week.
All in all this is one of the hidden gems in the Texas state park system.