We actually lived in Wisconsin for a time, NWG! But not nearly as far north, down near Richland Center. Lovely roads indeed. We also lived in Kansas but in the KC metro, so plenty of roads (and bike paths) there.
We've visited most of the states you mention but did more paved and unpaved bike paths there, not so much on the roads. This includes our trip to Iowa, Nebraska, and the Dakotas in 2014. We're heading that way again so good thing we have our mountain bikes with us. 
Wisconsin is not on the agenda this year but definitely in the future. My DH has cousins there, and we love the state.
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow