There's also the Juan de Fuca Trail just to the South (From Port Renfrew to just about Sooke). I've hiked this once about 5 years ago and it was pretty enjoyable. Not as long or challenging as the WCT but still fun (about 4-5 days I'd say, but very weather dependant). It's a lot less crowded and camping is only $5 a night. No amenities though so you need a water pump. There are 4 or 5 accesses along the route as well, which can be handy.
http://www.juandefucamarinetrail.com/