Order from NYC and have it shipped somewhere south of the border that you can pick it up from? I live in Central Illinois, and if I order film from B&H on Monday morning, it's at my doorstep by Wednesday evening. That's with ground shipping. I might be able to get it a little bit quicker if I shipped it by air, but ground shipping is fast enough (it comes to me usually UPS, not post office).
When we went to Walt Disney World in Florida back in 2007, we sent a package to the resort (since we were flying) and they held it for us to pick up when we got there. If you're staying in a hotel, and you have reservations already, give 'em a call and find out if you can do the same thing.