Hi there
My M in docked in the Barrie City Marina.
My playground is primarily Kempenfelt Bay and Lake Simcoe.
I have been all over much of Ontario and its many lakes.
We are truly blessed to have such a diverse area for boating of all kinds.
I have become lazy, and like just leaving my Mac in the water from May to Oct, so I tend not to venture too far from home anymore.
Lake Ontario, can be beautiful, and dangerous, all in the same day. With your experience level as stated, be careful how far out you go if trying that lake out.
Same story for Simcoe, or any of the greats around these parts.
Some of the best places were mentioned by others already.
I toured the Trent/Severn Waterway from Simcoe to Georgian Bay and highly recommend that trip also.
Try this area for sure
http://en.wikipedia.org/wiki/Beausoleil_Island
Cheers
G