Cortes Island is now listed, I tried it myself, you are good to go (if you have a registration # from the confirmation email):
1-833-838-2323
It is listed as
Cortes Island, Gorge Hall, Robertson Road.Need more info?
Click here.Problems? Call the Health Unit in Campbell River 250-850-2110 and see if they can help you with your registration details that are/are not in the system.