We enjoyed a trip to Tofino on the West side of Vancouver Island, That was about 12 years ago and at that time it seemed all the Hippies who lived in old Volkswagen Vans resided there. Not sure what it is like now, but it was an interesting place to visit back then.
If I remember, the trip across the Island went through a huge grove of very big
cedars and the road was a bit tricky for large rigs - something to check on before doing.
I also remember stopping to see a a large wooden aircraft anchored in a lake on the way. It was either the Howard Hughes Spruce Goose or replica, or similar - memory is not as sharp as it once was! It was impressive though.
Maybe someone else can help with my suggestions. Also 4 days is not long enough on the Island.