Driving cross country and debating between going to Toronto by way of Sault St. Marie and along the north shore of Lake Huron OR turning south and going down I-75 to Buffalo. Niagara Falls is our destination. Coming from So. Dakota- figured we'd turn north and head toward Minneapolis, then east along the northern Michigan Peninsula. How are the roads from SSM to Sudbury and on to Toronto and is it scenic? Any help appreciated.