I am biased I guess since home is in Bruce County but
There is lots to do in that beautiful part of Ontario - beaches hiking cycling canoeing/kyaking small interesting towns.
as well there are several lighthouses to tour and at the top of the peninsula is the large ferry that goes to Manitoulan Island. The lighthouse in downtown Kincardine has a museum inside. The Chantry Island lighthouse at Southampton is on an island. A tour boat takes visitors out there.
Here is the contact for Bruce County Tourism.
http://www.explorethebruce.com/