I have few MRs coming up which require positioning at YYZ but I have hearing/reading of too many negative experiences about CA immigration. Ideally, I would like to fly from LGA-YYZ on day of MR but since I have never explored Toronto, I could take flights a night before as well.
I do have GE and if it helps, I could apply for Nexus as well. Any tips on how not to get hassled by the Canadian immigration hoodlums?