Thanks for the glowing report Ken! Yes you are very welcome to display it.
One thing that I have found about photographing socially is that "hiding" isn't the magic. It is about breaking the ice and then getting in where you need to be for the shot you want.
This train is a tourist attraction, the ice was broken for the employees the very first day they worked at the train. The tourists with cameras though haven't broken their own ice, probably 15-20 of them were 10-40 feet back and shooting wide; the tourists are generally afraid to approach and enamored more by the whole experience than the details.
Shooting weddings is similar; break the ice early and get to the point where everybody ignores you so yo can do what you need to do.