Wading Mitchell's bay for small mouth in the spring should be very effective. Their may be some wad-able carp fly fishing around Point Pele. About the closest Trout Fishery is the Grand River near Eloriya (Guelph area). It is an excellent tail-water fishery for natural reproducing Brown Trout. I would suggest you contact www.grindestoneangling.com
for further info. Most of your other trout opportunities will be north of the Pinery towards the Bruce Peninsula or Northern MI. The Grand is two hours from Windsor, anything else is three hours or more to my knowledge.