Not many options in the north Lake. That is L. Michigan for those of you from the east that assume we know what you are talking about all the time.
Sailboats, Inc. in Manitowac, Wi, or Bay Breeze in Traverse City, Mi are about your only choices. Manitowoc about 60 miles, TC about 100 NM. However, I think you will find a few companies that do captained charters in the area if you do the searches.