Minnesota
-Hyland Hills generally has a very good park. However, it's almost always packed with kids, icy, and filled with bombholes
-Trollhaugen has great rail setups. Not sure about jumps.
-Afton Alps should be crazy good this year since Vail bought them out and is improving their park.
-Spirit Mountain has a great park once it's all set up.
Wisconsin
-Tyrol Basin has a sick park
-Giant's Ridge has some of the biggest jumps in the midwest, and one of the best parks.
Michigan
-Cannonsburg. Watch some edits - they generally have some creative features and nice jumps.
-Brighton was bought by Vail and may be great this upcoming season.
Indiana
-Perfect North Slopes. The middle of Indiana is probably the last place you'd expect a great park to be, but sheeeit. I went here on a school trip last year and was quite impressed. Jumps were proper and there were some burly rails set up.