I was in that club for several years. Good people, and an awesome assortment of cars. Problem for me was that they only meet 3x per year. I was looking for a club where I could interact with other members more, and we could exchange tips/parts/sources/information for restoring the cars.
Other than that, I don't know much here in SE MI. It seems that the old Motor City Mopar group is gone. Of course, the bigger groups like the Bearing Burners are around, but that is not a Mopar-exclusive group. The WP Chrysler club has an active group in West Michigan, but I don't know about over here.