Chances are that folks (tourists) from the US won't get poor treatment from the locals, but sometimes, as fellow Canadians, we have endured poor treatment. Quebec tends to be very "local" compared to other provinces or states.
Have seen it both ways-it's not restricted to one side of the border or one nationality.
We still haven't decided if we are going to stick to our original plan of Bar Harbor or go to Quebec. Drive time is minimally different. Just trying to decide if we want to go somewhere new or go to a tried and true spot.