You might check this out:
http://www.lakeforkrvparks.com
Also if you play golf there are about 20 guys camping at Tyler State park from Thursday 9/22 to Sunday 9/25. You're welcome to join us.
One more thing...check out the North Texas Camping Association (
http://groups.yahoo.com/group/ntxca )...a good bunch of people that have organized campouts about once a month.
WELCOME TO TEXAS!