Transportation to and from the island is not included in the cost of the workshop. You will need to make your own transportation arrangements. Here are some links to help you.
Boats to Avalon, Catalina
Catalina Express: Many daily departures from Long Beach, San Pedro, and Dana Point (800) 613-1212 -- Senior discount (55+)- $6.00 off
(note: You may not be able to book until December 2017 - Call the number for further information.)
Check out this deal:  recently spotted at CostCo.
Catalina Flyer: Departs from Newport Beach once a day. (949) 673-5245
Helicopter to Avalon, Catalina
Island Express: Daily flights from Long Beach and San Pedro (800) 228-2566 or (310) 510-2525