For floatplane training, I highly recommend Lake Country Airways:
Lake Country Airways: floatplane training, endorsements, float charters and rentals
They are an hour and a half drive north of Toronto. Beautiful scenery, and hardly any traffic, you're never waiting.
bear in mind that bush flying demands a whole different skill set than wheel flying from airport to airport, or IFR flying. You can get a float rating in 10 hours, but that is nothing more than a license to learn the water. 50 hours of water flying experience is a good aiming point before even thinking to go to work water flying.
Bear in mind that nearly everywhere you land a floatplane is not an aerodrome, and there is no infrastructure to make it easy for pilots. You're figuring out the winds, and making all the decisions, with no help. And, getting it wrong means you're in trouble at a place where there is little or no help. Weather information is difficult to obtain, and when you do, it lacks the detail you're use to seeing.
Float flying is great, see some of my photos on the photos sticky, but it is demanding....