Wait wait wait... back up -
Ifrit - do you seriously and honestly believe that they would take the few hazers they have in the scooby disco room out, thereby ruining one of it's better effects, so that they can fog up the park for Hallowe'en?
They won't be needing to do that for almost 4 weeks... why remove them now?
The smoke produced in the scooby disco room is thin and hazy across the entire room
the smoke produced outdoors (where it has to contend with wind) is thick, dense and is released often, and with a lot of noise
The few inside Scooby wouldn't be sufficient (firstly as they're probably the wrong type), to smoke up the entire park... so why go to the effort of removing equipment in a permanent installation, when you're still going to need to hire in more of them anyway?
I don't believe tech services would cannibalise effects on permanent attractions for a month long series of night events (unless it was a last-minute replacement to ensure the show went on for that night before fixing the issue properly the next day).