Are they requiring guests to wear masks?

Yes, you must wear a wask to board the train. The dinner was excellent and the actors in the performance we're really good.

All of the actors wear masks throughout the performance. Most guests just wear a mask to board and once seated, remove them. I didn't see anyone using a mask between courses of the dinner

Yes for boarding, or when you are not eating or drinking. They give you a copy of the Government rules required for trains