I voted Moab. Origionally I voted CO in the other poll but the more I thought about it the more I think Moab would be the best for a few reasons. First, alot of the "base camps" for a CO run are small towns (IE Ouray, Leadville, Buena Vista/Salida) and do not have large parking lots, or many decent choices for lodging or food sometimes. Second, in alot of places the Colorado trails are spread over a large area with alot of highway driving to get to some. I love to go to CO for wheeling and I have organized/ helped organize many runs there. I think for the best showing of all sizes of Explorers Moab would be the best because there is trails for everyone, and plenty of lodging choices. Plus as 410 said it is the mecca of 4 wheeling.