It's a little off topic for this board, but Crossroads Village/Huckleberry Railroad's annual railfan weekend is this weekend. Between the 1:1 scale live steam engine and the passenger train, plus the period village, there's plenty to see and do. Plus, and relating to this board, there should be a couple of model railroads on display.
The last time I checked the weather, the forecast called for sun and '70s all weekend (Saturday and Sunday).
For those not familiar with Crossroads Village, it is a Beheaded County park, located northeast of Flint.
Charles W.
Railfans Weekend Information Page