UP with hookups

We are thinking about a trip to the UP, and even upper WI, this coming summer. We want electric & if possible water hook ups, full hook up is a plus. Not really fond of private/commercial parks, preferring state, county or municipal parks spending a day or three at each, pending location, amenities, etc.
We'd be coming from St. Louis, MO & more than likely up through WI, but MI is not out of the question.
Any suggestions, ideas or warnings?

thanks