Do I need extra heavy duty tires for summer driving in Yukon Territory and Alaska. Are some brands/dealers more available than others?
It depends on what you’re driving and what kinds of roads you’ll be driving on.
I think that Canadian Tire would be an excellent source for appropriate tires for this trip. I would suggest that you describe your destination to the sales rep and take his advice on which of their tires to buy before entering the Yukon Territory.