It's unlikely that you'll see Jason just by hanging around the bus after a show. He's usually pretty tired and the group has to get ready to go to the next city. The tour schedule's pretty tight this time.
However, you should check your local radio stations to see if they have any contests for official meet-and-greet opportunities. There were several great ones here in California (didn't win any...darn!) and I'd bet you can find some in Vancouver as well.
Some shows have also had charity auctions benefitting MusiCares, where you could bid on pairs of tickets for the front and the highest bid won meet-and-greet passes. I'm not sure if those have ended yet, although it's unlikely there is one for Vancouver.
Also, welcome to the board and I hope you enjoy the show!

