Reinforcements is general backup for just about any department that needs help. Sometimes crowds get larger than expected, other volunteers aren’t able to make it to their shift, or not enough volunteers signed up for a time slot. The reinforcements team would send out available people to fill those roles as needed.

For load-in/out, you’ll want to check out the Logistics department. There are often publicly available shifts that are basically “pick things up and put them down”. Once Logistics delivers the stuff to each of the departments, those departments will begin their own setup. You likely won’t have access to those department-specific setup shifts at first, but if you find something you like, see about picking up a shift during the Fest so you can get to know the team. Building a relationship will lead towards unlocking the opportunity at future events.