Spend some days at Montreal Trudeau Airport.
All info on Rules and Regulations on Canada Airports and also photo locations can be found at:
http://www.contrailsphotography.com/spotting.html
Some local photographers are also members of the Airport Watch.
They keeping an eye on irregular activities around the Airports.
I've spoken to two of those individuals and they gave me very valuable info on where to park your car and the best spots to take pics.
Below an impression.
Takeoffs from 06R. You need some stairs (4 steps) to get above the fence.
A distance of 3 meters from the fence is to be maintained at all times.
Takeoffs from 6R are taken from the Fedex Parking lot on 55 Avenue.
I made a new topic for 6R landings.
Bastiaan