Do many campgrounds discriminate against TC's...?

I ran into one of those TC don't camp here spots near Austin here there web page http://www.sunsetpointlbj.com was looking for a spot to use our free night from good sams club saw there name at good sams web page so we headed over on our way home from Az well found them easy anoff have a big old sign out on the hwy no mention of No TC allowed have to dig throw there web site to find the no TC, tents or Pop-ups allowed. What was so funny our 75k rig was better looking than most in there