Thanks for all the suggestions and comments thus far.
Luckily been able to extend the trip by a day, so we now leave Vancouver on the 9th and arrive back in London on the 10th. Also means our return flight should be New First and not old first we thought we'd get. ^
At the moment i think hiring a car from Vancouver and driving to Campbell River for the 4 day Kayaking, the drive to the Wick Inn near Tofino for 3/4 nights and maybe head somewhere else on the way back to Vancouver to finish with a few nights there.