As far as I know the best area for salmon is around Collingwood and further North-West to Owen Sound, and West of Beausoleil Island (the Hole) and around Giants Tomb Island and Christian island. As people say pike is abundant off Collingwood.
I heard that there is nice walleye fishing Between Beausoleil and Honey Harbor but not sure as the area is quite busy.
If you go North to 12 Mile bay then I would say salmon fishing is quite slow comparing to the South, but yes, the scenery is exceptional. I fish there often. Some pike and bass between islands and in the bays, but I never got any walleye in there. Maybe I just don't know how to fish walleye though...
I would suggest to study some maps and Navionics charts... It's a lot of resources now, you don't even need to ask. Salmon is deep, pike and bass are around the shore... I would say quite simple...
All IMHO though...