"Travel from the Ferries: Board the 70 Pat Bay Highway bus at the terminal on disembarking from the Ferry. This bus will take you to downtown Victoria. To visit Butchart's Gardens transfer from the 70 Pat Bay Highway to the 75 Central Saanich in Sidney. Your driver will be glad to assist you with directions."
"Travel to Swartz Bay (the ferries): Board the 70 Pat Bay Highway on Douglas Street from Crystal Gardens (Douglas at Belleville) north. In downtown buses stop on Douglas north of Belleville, Courtney, Broughton, Johnston and Fisgard and at all bus stops between Fisgard and the Ferry Terminal."
"One way fare from the Ferry Terminal to downtown (or reverse) is $2.50 for adults, $1.75 for seniors or children. Day Passes can be purchased from a vending machine at Swartz Bay terminal or at outlets in downtown, including Tourism Victoria."
A day pass costs 5,50$ - if we plan to take the bus more than twice (which would be the minimum, since we have to get to Victoria from Swartz Bay and then to Swartz Bay from Victoria), that would be useful.