You might look around on this site for their route and hotel info.
Of course, they just consider Montreal the turn around point.
And they have a time limit on the round trip so hotel stops are sparse.
http://www.geocities.com/b-m-b/

Bill Wright wrote:
Next summer I plan to ride from Boston to Montreal with overnight stops
in Concord NH, Whiteriver NH, Northfield VT, Sutton Que and St Jean Que.
Any help on routes for any of the days would be appreciated. I will be
sleeping indoors and travelling light.