While you wait for somebody to answer the question, I would highly recommend that you take an appointment with your nearest IIRC office.
The whole process from the day you make the call to the day you do landing takes less than 2 weeks.
If you have two weeks to spare, there is no reason to flagpole and add extra work for border officers. Unless you have an urgency, i'd recommend to not flagpole.
Due to high number of flagplling, they have now implemented these policies in Niagara region border, so now even people with an urgent need can't flagpole on weekends.