If you volunteer for one thing, you are drafted into all the things.
Bands need roadies. Roadies carry heavy things. If you are present, you get to be a roadie.
Band kids play their instruments randomly, amongst crowds, loudly, while carrying on conversations, as though this were completely normal.
The school buses might not show up.
Despite having a reservation, the moving van rental company might not have a van for you
The moving van rental company might have a nationwide systems outage.
During your departure windows, a marathon appears.
Some bands have trailers, and rent moving trucks. Other bands have tractor trailers, and rent truckers.