Long trip, would take a summer
I haven't done it, but I have done some research. You are talking about 1,500 n.m. of mostly river travel. At Quebec City, the tides are up to 18 feet and the tidal current 4 knots; this keeps up for the next six hundred miles or so. I would think that you would do real well to average 50 n.m. a day, so probably at least a month one way to Nova Scotia. Back home is harder as you are fighting the current of the St. Lawrence from Quebec to Kingston, 300 miles or so.This is not to mention conditions in the Gulf of St. Lawrence, the world's largest estuary, which can include fog, gales and close encounters of the freighter kind.In short, this is a complex trip requiring a lot of planning and at least two to three months to execute. Really the only time to do it is between May 15 and Sept. 30th. Before then the water is really cold, after that the winds will be scary.Best of luck, I hope you do it and tell us about it.