What site is that Andy?
I don't know exactly, trying to find it in the below guide. That pic is on the main landing area of the State Park website-which is an awesome site by the way.
They have a 103 page vehicle campground page that I've been going through this morning while listening to the British open. Tons of work getting done here today...
http://tpwd.texas.gov/publications/pwdpubs/media/pwd_bk_p4501_2059.pdf