I know this thread hasn't been touched in 4 years, but I assume people still refer back to it so here's this. We went this past weekend to test it out, everyone had a good time. Entry fees were cheap and it offers a variety of trails (mild to extreme). A great place if it's your first time working rocks, because it has plenty of small climbs and a creek bed full of small boulders to crawl around on.

Long Ranch
Llano, Tx
http://www.longranchwheeling.com/