When I was visiting with a cast on my leg, I asked my CM DD if that qualified me and she said
:...
On our last trip, however, we were using our guest assistance card to skip the stretching room at Haunted Mansion (it is too intense for 9yo) and we were taken through a couple of CM only doors (the first time was the entrance to the stretching room, the CM didn't understand, so we were re-routed to another part of the attraction). The show was still "on" in those areas, and probably served as a way for the CMs to step into their roles before stepping into the attraction.