Oh yeah!! They will just add the new stuff out on the floor, but whatever is there in stock, you can buy. You can also order and they will ship to your home (they always do the shipping free at the boutique, but not sure how it works in Canada). Holding it for you means it's reserved in your name. The only caution is to follow up and make certain it's really being held for you because sometimes they forget when they get off the phone with you. This just happened to me at the outlet over the weekend with a wide bangle, and when I got there, they had sold out of the wider style because they didn't hold one for me like they were supposed to. It was a good little drive for me too, so I was a bit pissed.
Congrats and have a safe trip!!