ps, Ive ridden from Montreal to Boston, so more north, but Im sure you'll have as nice riding areas, especially the further east you get. Pretty area as you know.
I'd love to do the Bos to Mon ride. Circle the perimeter of Montreal and Laval.
Last year I took a trip to Montreal (via car but I brought my bike) and climbed up the Camillien Houde / Mt. Royale. Truly an amazing sight of the city from the top at night.