Brilliantly done, Bill! This looks like the "Ghost tour" that we enjoyed there. You were fortunate that almost all the people remained stationary during a 30s exposure. A great capture of stars too, including the Southern Cross.
Pretty cool shot. I remember all the sounds of the camera shutters going off in the background during the ghost stories... "And these two kids *click* were walking down the street, when *click* they were *click*..."