Hi Daniel,
Twice you have asked about taking snakes into Canada - in both threads I have mentioned ball pythons are CITES 2 animals and that you need paperwork.
You will definately need to arrange this in advance as both sides probably need papers - you to import and the seller to export.
You cannot turn up at a show, buy an animal, and take it across the border.
Talk to one of the bigger breeders as the others have recommended - they will be able to tell you what paperwork will be needed, how much it costs, where to get it and how long it will take for it to be in place at both ends.
dr del