Driving through Iowa, Illinois, Wisconsin, and Minnesota (in no particular order) and need some advice on local beers

In early July, I'll be leaving Colorado to head to a family reunion in Minnesota. I'm planning on meandering my way up there, making some stops along the way to visit with family, so I figured I could make some time for beer as well. If there are any locals out there in the above mentioned states (hell, lets through in Nebraska for good measure), what breweries should I try to visit or what beers should I try along the way? At the family reunion I'm planning a beer tasting, so any suggestion are welcomed so I can expose some West Coasters to some tasty Mid-West brew.