If you plan to call this weekend to make future reservations, plan to call before 3 p.m. Saturday or after 7 a.m. Sunday as the Call Center will be closed temporarily. Here is the bulletin from WSF:
Beginning at 3:00 p.m. on Saturday, April 2, the Call Center will close in order to relocate the Customer Service office. Reservations can still be made online at Save a Spot. The Call Center is scheduled to reopen on Sunday, April 3, at 7:00 a.m. Updates will be provided when information becomes available.
Save a Spot: http://www.wsdot.wa.gov/ferries/reservations