I've gone there twice in the past 2 yrs. There's a handful of us between Austin and San Angelo that make a yearly trip and meet out there in the beginning of October. I've had many thrills, chills, and spills in the past couple of years going out there. :) Here's a link to a memorable moment at the sand hills. :) http://dirtrider.net/forums3/showthread.php?t=86730
One of my buddies has a website with a bunch of pic and video clips of some of our adventures out there too. Check it out at http://www.txextremesports.com
Keep in touch and we'll let you know when we head out that way again.