Just to be clear, Tobermory isn't in Lake Superior... It's in Lake Huron. Lake Superior is a ways away from there. On the southern side of Lake Huron, (which is I suppose the eastern side technically, there are a few wrecks like the Wexford. Across the lake, on the US side you have the Sanilac/Port Huron/Alpena triumverate...
In the far SE corner of Georgian Bay, there is the Pentanquishene area with a number of shallow, warm water wrecks.
Just by way of a word of caution... the distance you are planning on travelling is immense. For several years, I have tried to take a trip around JUST Lake Huron, with a side trip to Whitefish Bay in Lake Superior. My plan (loosely) was start in Tobermory (where I have a place, so skip diving there) up to the Northwind in the North Channel, across to Whitefish to dive the Mathers, Osborne and others, then down to the Straits of Makinaw where there are lots of great wrecks (Eber Ward, Cedarville etc.), down to Alpena for a few dives (Spangler, Windiate etc.), then Port Huron (Dunderberg etc.) and then around and back up to Tobermory. I figured that little trip would take me two weeks to do the dives I want... and I have my own boat! Many of these wrecks are deeper than 130', but there are many, many wrecks in shallower depths.
Also, don't underestimate how cold the water will be. Below about 70', the water temp will probably never be warmer than 42F, and could drop into the mid-30s. This is not wetsuit territory IMHO.
I should add that I have yet to make it... I always get blown out somewhere along the way...