Wow, thanks so much again for your detailed reply jimbo99! It must be exciting to have seen the country evolve or stay the same over the course of so many years.

An update: a couple days ago, we did get confirmation from Vietcombank through our bank in the US that the money was indeed deposited in the Saigontourist account. So, a bit of needless anxiety, but it's mostly supplanted by good memories from the trip!