http://vintageoffroadnationals.com/
Here is another link with updated info. For those that do not know, there is a new class this years, a "Wheelie" class. A box stock class for the 2wd tamiya wheelie vehicles (Midnight Pumpkin, Lunch Box, etc).
Also, the race schedule has changed. Classes have been broken down into days. Classic, heavy metal and wheelie classes on Saturday. 2wd, 4wd and stadium truck on Sunday.
We also found out yesterday that Cliff Lett will be there on Friday for a Q&A session Friday night.

http://vintageoffroadnationals.com/news/