I live in Madison(south central) wisconsin. In the interior of the state, people do ride the smaller, gusty, inland lakes that are plentiful. The lakes are surrounded by forests and cottages so access up there may be tricky but I am sure the locals have the spots scoped out. If you will have a car and time to travel, lake superior is just to your north and there is plenty of kiting up there (cold though, wet suit 95%of time).
There is a southern wisconsin forum that a couple of the guys from minoqua post on from time to time. You can check www.kiteridersllc.com
and see if you can find any info there.