Grand Rapids is considered "Beer City USA". This is due to the city's numerous craft breweries, including over 80 breweries. New Holland Brewing is one of the most famous.
Old Peninsula is the area of upper Michigan that is considered wine country. There are many wineries you can stop at while driving up the peninsula. Alex and I did this with Calvin 3 summers ago.
We haven't gone to Mackinac together but both have been individually and its breath-taking. Small island, only accessible by short ferry, where there are no cars - only horse drawn carriages and bikes.