Grand Sable Lake is awesome as well as the Hurricane River mouth.
Come now the Upper Peninsula of Michigan is known as God’s Country. Please there are not 17 reasons not to visit Michigan. If you like islands there are more islands than just Mackinac island - Les Cheneuax Islands (east of mackinac Island). west of mackinac is Hog Island. Hey you want to visit several State Parks and National Parks - Pictured Rocks near Munising. How about the Fayette park near garden center MI. there are are Taquhemon Falls, Whitefish Bay Ship Museum - The Edmund Fitzgerald.