Very nice park that is very close to Houston. Great hiking trails, fishing down at the river, plenty of trees at the camping sites.
We did the electricity/water sites but I think the more rustic sites would have been perfect for us. A little more privacy, yet not too far from your car like at other state parks.
Do watch out for snakes as we met one on the hiking trail, but it took off faster then we could.
Also, be aware that there are some train tracks not too far away. The train can be very loud at night so if you are a light sleeper, bring some ear plugs.