I’m sorry I can’t answer your question, but in my experience it’s extremely rare, and on the few occasions when they have had actors in there during my visits over the years, it’s simply one in the pre-show room, but the “scares” are minimal and it’s more of an “opening and closing the doors” sort of role. Another actor or 2 is then in the corridor just after the station exit, although realistically the scares here are minimal too and it’s more for show as you file past.
My advice would be, if you’re really wanting to ride TWD, depending on your phobia of course, it isn’t comparable to a scare maze and is a very brief interaction. You’ll be walking past them for a few seconds at most, and the environment doesn’t lend itself to being scary or really give the staff any opportunity to hide.
you’ll also be one of a trainload of people so it’s safety in numbers!
If you just come through the doors, keep your head down and walk, once you’re in to the narrow corridor you’re past where the actors usually are (if there are any!)
I think there will always be someone in the preshow room, who often has a mask of some sort on, but as I’ve mentioned it’s far from a scary experience and really no different than any member of staff dealing with a preshow 🤷♂️
Do they even have actors in there anymore actually?