Early in my firefighting career with Ont MNR the Canso was our standard heavy water bomber. I worked dozens of fires where Cansos were used either for Initial Attack or to support ground crews. The Canso was surprising quiet on approach at low level. These A/C were not owned by the Province but either leased for the summer or on short term contract during "fire flaps" Georgian Bay airways operated an A/C that had sunk a U-Boat in WWII. If I remember correctly The Canadian Warplane Heritage wanted to buy this veteran but couldn't raise the funds. I believe the A/C was sold off to South America. The Canso now operated by CWH is an ex Province of Quebec fire bomber.
I did one flight in the old P-boat. Ferry flight from Timmins to Geralton. Couple things I remember well is the flight crew putting a 5 gal pail of oil in each of the big radials before departing Timmins. The other was the "hard" landing in Graralton. Best way to describe it would be landing a loaded dump truck. It hit hard and stayed stuck with absolutely no bounce. My only Canso landing so I have no idea whether they were all like that.
Spent a lot of time in and around radial engined A/C early in my career. Beavers, Otters, DC-3's, CL-215's Norseman, BE-18's ,a couple S-58 helicopters. Ont also operated 6 Trackers for a few summers in mid 70's. Still love the sound of a radial firing up. Still hate the smell of kerosene.