We have stayed there several times. It is a very popular park and seems always to be near full. There is a "disk golf course" and a water park nearby. Almost always many families with children. You will need reservations.
If you do go, be very careful about the route you take to the park. For us the most direct route includes crossing a railroad track that has a steep approach on each side. You do not want to use that route. I can give you directions if I know from which direction you are coming.
I think it is a great state park although it is not right on the Gulf.