I've never been but here is link to website. The place is in a bit of a legal fit with township to open as commercial ORV park. They have permission for charity one day event.
http://www.kidsinthemudd.com/index.html
Here's link to forum at 4given4x4:
http://www.4given4x4.com/forums/view...=asc&star t=0
Looks like it's going to be a pretty big event, would be nice to see Hummers well represented.