As a resident of WI, I have been to the Minn, Iowa (DSM), MI (Allegan), IL (Springfield), IN (Indianapolis) statefairs lol..

Iowa had some very interesting food while Minn prob had the best overall. We did wait 30min fo cookies that were awsome. Mostly went to see concerts but generally did spend the day wandering around looking at things, the Worst was IN (dry), IL was dry in public areas, had a special drinking tent haha. I don't remember totally about the others.