We stayed in a tent only spot for 8 days in Dec. Really quiet even with a trail behind us. Lots of winding beautiful trails. One of the cheaper Texas State Parks so the trails aren't very long.
BUT the real hidden gem was in the bathroom by the yurts. They have a disabled shower. So it's within reach and the showerhead is lower. Awesome to use to clean my toddler without getting drenched.
Felt very safe, even walking around past dark. We saw feral hogs a few times at dusk. Really loved it.
The playground isn't very good but you are 20 minutes from Abilene with oodles of great parks and a small zoo.