I notice that on Industry Canada's site they say that the exemption of the requirement to have a radio station license for aircraft only applies if the aircraft is not operated out of Canadian sovereign airspace unless "the aircraft is in the territory of another country with which Canada has entered into a reciprocal agreement that confers similar privileges on Canadians" Presumably we have that agreement with the US which is why the requirements for US pilots and aircraft in Canada to have the license has also been dropped.

Oh, and JS - yes, definitely go to Invermere if you can! I have memories of some fantastic flights there. Too bad I haven't been able to get away for even a week in the summer for the past several years.