Are you heading towards Québec by public transport or are you cycling there?
Anyway, your transport options are:
- The bus service
from the airport to downtown (Queen E. hotel, Gare centrale d'autobus and a few other points): as long as your bike is boxed, it's a piece of luggage just like it was on the airplane. Frequent service, but not cheap.
- Commuter train
from the Dorval station to downtown. Problem is, there are departures from Dorval at 14:32, 17:22 and 20:32, and the train station is about 2 km from the airport terminal.
– This route
leads you out via downtown Montréal, then North-East to Repentigny and eventually Trois-Rivières and Québec City.
For the most part, the route is as scenic as you might get in a city.
Around km 0,5: if you don't like the narrow and busy tunnel and roundabout, you may walk through the commuter train station which will be on your right.
km 8 to 20.5: The Lachine Canal path is superb, very direct and leads you to the Old Montréal.
From there I suggest boul. Saint-Laurent North, then Sherbrooke East (to avoid that stretch of "cycling path" on Notre-Dame), Honoré-Beaugrand South and Notre-Dame East to Repentigny.
Problem is there might be a few hidden spots for camping on the Lachine canal or on Île Sainte-Hélène (a bit off track from the Old Montréal), but that would work only IF you don't use the tent (i.e. no rain) and these spots are probably very busy with roofless people. Likewise, there is a small park/forest around km 45, but I would NOT recommend setting a tent: it is officially classified as Park, so fines are heavy.
– This route
goes through Laval. It's longer and not as scenic, but for the most part, it's fairly easy cycling.
The first part is on the service road of Autoroute 520. Be wary of right turning vehicles at autoroute 13 (km 4).
km 18 to 28: it's on the cycling path which is on the East side of the railroad track. There are quite a few "hiding spots" on that stretch, and unless you have a bright yellow tent, I would not be wary about camping there.
km 32: This is the easternmost bridge you may cross on a bike. The Highway 125 bridge (km 45) is out for the Summer.
km 33-57: This is a nice road with quite a few historic houses... and bad modern developments. There are very few camping spots on that road, however.
– If you want to camp really early, this route
should do it.
km 11-12 are through the Regional Park Bois-de-Liesse where there is officially no camping, but where I'm sure you will be able to find opportunities for guerilla camping. Other opportunities outside the park, between km 12-14. Then you reach civilisation. From there, continue either through Laval and the North shore, or follow this...
– Here is another option that could be mixed with the two previous routes:
Circle the island of Montréal on its Northern Shore. Use Gouin Boulevard all the way from highway 117 (boul. Laurentien) to the Eastern tip of the island. There are a few possibilities for guerilla camping near the East end of the island (but don't do it in the Parc de la Visitation!).