I would be very surprised if you don't receive a detailed listing of what to pack.
It looks like it will be an awesome workshop.
Definitely decide what colorway you want to work with and choose your fabrics accordingly - and then choose some extras that coordinate but differ in contrast and value in case you want to change something along the way.
Be sure to pack your power cord for your machine.
I would love to attend the workshop but will be out of town with family that week. (Not that I saw it in time to register).
Cheers, K