I think keeping the actors a lot more general in X-Sector would be better, by this I mean dressing them in a costume suiting both The Smiler and the rest of X-Sector, maybe the area logo emblazoned onto a black modern uniform (but not army style), these could then walk around the area and warn guest of observing any instructions given and to 'keep clear of the perimeter fence'.
I suppose this idea comes from the notion in my mind that the Smiler will overpower X-Sectors existing theme too much. Already the station in the plans does not match the existing X-Sector building and I feel it should blend in to X-Sector just like Oblivion does.