They weren't for the most part actively hostile, but they were a long way from being "brothers in arms," which was why I said George was over-optimistic.
The Quebeckers has just obtained religious freedom from the British and they and the New Englanders were bitter enemies. This grant of religious toleration to Catholics was one reason why New England revolted. So there was not trust there. As it was, Benedict Arnold came close to taking Quebec City after a brilliant march through Maine.