Amazing state park that seems to be a hidden gem. I'm surprised this isn't a more popular park. While it doesn't offer more than about 15 miles or so of trails, the trails here are amazing and family friendly. There are 2 trails, Juniper Ridge and Rocky Ledges, that might be difficult for little ones.
As far as for RV's, all sites at the Comanche Camping area are electric and water only. The dump station is near by. Showers are available and the restrooms seem to be clean enough. Will definitely go again.