It would be great to do a get together. Stoney Creek is nice. I also want to suggest Kensington Metro Park. We could meet up there, and go for a drive out that way. I don't remember the name of the road that comes off of it, but there is a road that goes west from US-23 (a couple of miles south of Brighton), and it curves around and over a number of gentle hills before spilling out on to M-52 in Chelsea. That's an excellent weekend drive, and can be a ton of fun at a modest (legal) clip. So, here is my suggestion:

1) Meet up for a picnic and Kensington.
2) Drive out to Chelsea via the curvy route mentioned above, choose an equally fun route to loop back to the Detroit area.
3) End the ride with optional dinner and drinks (any place with outdoor seating & plenty of parking).

So, I guess we would need to pick a weekend. I have to forewarn you that even if I am enthusiastic about a get together, I am going to be VERY busy this summer getting married and going on business trips. That said, I would make every effort for a MI run.