Might I suggest that your host town be Leaky, Texas. It is at the confluence of the Twisted Sisters. Bandera is about an hour away.
As some of you know, we had a Rocket Salvo event there back in 2010. The host site was the Frio Pecan Farm. Nice 2 BR cabins in a pecan grove.
This event was also my chance to obtain my Iron Butt Association credentials. Completed a Saddle Sore 1000 on the way down and a Bun Burner 1500 on the way back.
Some additional info:
Motorcycle Riding in The Texas Hill Country