The folks at clubhummeroffroad and hummer4x4offroad are already pulling together the plans for the April 2013 Rausch Creek run. This is apparently the biggest run of the year, so I'd expect 20 or more trucks running green and blue trails (and maybe a burple here and there).
So far it's looking like late April; either the weekend of the 19th-21st or the 26th-28th. I'll continue to post info here as it becomes available. In the meantime, here's some info on the park:
http://www.rauschcreekoffroadpark.org/index.php
...and a map to give you an idea of how close/far it may be from your location
...and here's the trailer from the 12/12 trip to give you a sample of the experience:
http://www.youtube.com/watch?v=skMzM...ature=youtu.be