Betty,
Be sure to get some fudge!!! They are famous for their fudge. Also the movie with Christopher Reeve and Jane Seymore, was made ont the island at the Grand Hotel. It is, "Somewhere in Time" . By the way, Chuck used to go there every summer, as a kid with his family and they used to stay in the Grand.
If you are going to be for a week in the area, it is well worth to do a day trip to Whitefish Point. It is possible to do the Taquamenon Falls in this same day. Do both the upper and lower falls. On your way thru Ontario I would recommend going around the Georgian Bay. The Parry Sound KOA is excellent and do take a boat tour to experience the thousand islands. It is amazing! The best Walleye we ever had, was right there in Parry Sound, on the bay. These are just suggestions. In the end we all do what works for the moment.
Safe travels.
Marie