Thought I would pass along some potentially useful info. Don't know anything about this club but...
Just sold some tires to a memeber (RustyTJ) of Eastern Shore Jeep Association (http://www.easternshorejeep.com) out of Salisbury, MD and he mentioned that they lease 60+ acres in Delmar to wheel. The requirement is become a member of ESJA and pay $100/year which goes to the lease. I assume that you can wheel any time you want.
He also mentioned that they have a jeep "show" at the jeep dealership down there in June (I think) and then they go camp/wheel for the weekend.