Do NOT drive anything with a trailer. I have personally seen side mirrors get broken off on the Going to the Sun Road. I guess that would be four mirrors in two incidents. I put my mirror in on the road side. And of course it isn't you, it is the other people who are looking at the scenery while being scared to death of falling off the mountain and thus take their half out of the middle and cut the curves and there is no room to maneuver. And those big red buses you will likely want to take drive the road for a living and with an assurance that makes others nervous. If you want to enjoy the scenery, don't drive.