Could a Boston to Quebec City cruise interest you? Please check my other post, there is a very good deal for September 21 and it would be only a medium short ride from Ontario to get to Boston and a train ride to go back.
Are you looking for travelling by yourself or with your child?
I am Julie, 33yo female (I have a boyfriend but he doesn't want to cruise). I speak French and English and I could show you Quebec City and the surroundings if you want to take a few extra days before to return home.