That sounds like a dream vacation. You were fortunate to find a campsite outside of Devil's Lake. It is one of our prettiest state parks but maybe one of our worse campgrounds, way too crowded and understaffed. We enjoy camping there in December.
I was camp hosting in June and rarely on a computer so did not see you original post. One suggestion I would have given you was the State Fair Park camp grounds right in the city of Milwaukee. They have full hook ups and public transportation to anywhere in the city. You might put it on your list for next year.
1994 30' Excella 1000, Chummy III- Ford Excursion- 7.3 Turbo-diesel