That sounds about right. A quick check shows Milwaukee's Main Fairway Entrance to Sturgeon Bay is 109 Miles. At 5 knots average that is 21h49'.
Its about another 8 miles through the ship canal and across Sturgeon Bay into Green Bay. I highly recommend stopping in Egg Harbor and Fish Creek. Egg Harbor has brand new docks as of last year,
Courtney is My Hero
If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most - E.B. White