Just my opinion, but I really don’t think they’d use the trams to shuttle people during the event. If it was any other year, sure, since they’ve done it before, but if they’re trying to save on money in a year where finances matter more than ever, using the trams seems like a money drain. The trams themselves can’t even be filled to capacity, they’d likely have to be cleaned each and every time they pick up/drop groups off, and so on; it becomes an issue of operating cost outweighing practicality, the way I see it. Even if Toxic Tunnel isn’t a scare zone, I wouldn’t be surprised if Universal still has guests still make the hike to the backlot on foot.
Honestly, though, who knows at this point! It could go either way, really.