[Steve/]

First I do not think we have been to a Texas state park we did not like. We have been to most of the one on your list,
Brazos Bend
Caprock Canyons State Park
Palo Duro Canyon
Looks like you been here. Inks Lake State Park when there visit Longhorn Cavern State Park
Mustang Island State Park the site with power are in a parking lot and restroom are used heavily by beaches goer, rare to find hot water for shower. But you are near the beach.