Getting there by water:

http://www.bcferries.com/ - website home

http://www.bcferries.com/schedules/southern/ -
southern Gulf Islands schedules

http://www.bcferries.com/fares/ - Fares; note throughfare prices for Tsawwassen through Swartz Bay to Fulford Harbour on Salt Spring, and vice versa.

http://www.bcferries.com/res/ - Reservations for travel between the BC Mainland and Mayne, Pender, Galiano, Saturna and Salt Spring Islands. Reservations strongly advised. (Not so important for Salt Spring throughfares, except to make the day's last sailing.)