Just found out about this event yesterday. Hope to see some more RBV'ers out there. I will be heading up that way Friday evening. Here is a little more info on it:
http://www.pirate4x4.com/forum/usa-south-central/1401665-5th-annual-okwftw.html
http://www.pirate4x4.com/forum/usa-south-central/1401665-5th-annual-okwftw.html