I'm not sure, I don't live in the area and I am not involved with EMS at all. I remember that they went to a staging area and were called to the scene one or two at a time, but I don't know if they went to a rendevous point first. I don't know how close to the scene the staging point was either.
There was a statewide drill within the last year, and the ambulances from my area went to a rendevous point then to the "scene".