We're putting this run together as individuals. This is not a 'professionally' organized event. that said, you should probably check for local 4x4 clubs in the VA, MD areas near you and see if they have a forum where they discuss when they organize similar events.
Cow mountain?
I listen to cows 24 hours everyday why would I go to a mountain to listen too more?
I'm in for the Frank place. Can be there bright and early Saturday morning. There is a good Pizza place where we can stuff ourselves on the way home at the I5 intersection.
If we go to Frank Raines, bring rain gear, Ray likes to splash water in the mud/water hole there.