The time from the hotel to the airport can very greatly and a few crews have missed their flights leaving at the scheduled departure time. Check with the driver as to what time you should leave.
In the past, I have been told I couldn’t use the crew line unless operating, whether in uniform or not. There is a special security line for Global Entry and Nexus, but it’s often not any faster than the regular line. As mentioned, you go through US immigration at YUL, so give yourself a little extra time. Global Entry or Nexus will help, but again, usually not by much.