We camp at Mustang Island State Park. You can find info here:
http://www.tpwd.state.tx.us/state-parks/mustang-island . It's basically a big parking lot and the sites are all back-in and rather close together. Each one does have a picnic table w/ portico and a grill. The RV sites are not right on the beach but the beach is close by. The sites have electric and water hook-ups only. There is a dump station near the office. The bath house is what you'd expect at a state park...clean and adequate facilities but nothing special. My kids were intrigued by the colorful frogs climbing up the shower walls! We've been several times and even when the park is fairly full, it is always quiet. The park hosts and park rangers are friendly and attentive. There are activities such as guided beach walks on weekends. You can drive on the beach so if you want a little open space, you can drive out towards the end of the beach and have it all to yourselves. There also is a jetty near the "day use" area and we recently saw a bunch of green sea turtles swimming close enough to touch. Across the road is the "bay side" of the park and it is a great area to kayak, collect shells, and watch sea birds. If you are looking for a fancy place with lots of amenities, the park is probably not for you. We love the simplicity of the state and national parks so it's great for us!
If you go to the Corpus Christi area, try to go to Padre Island National Seashore to see a baby sea turtle release -- it is quite a sight:
http://www.nps.gov/pais/naturescience/releases.htm . And eat at Snoopy's:
http://www.snoopyspier.com/ !
Beth and Dennis James
Austin, TX
2013 Bullet 248RKS