I don't work for Clark's but I think that the ideal footwear for excursions on this trip are "Muckers":
I will be bringing my pair, for sure. Ketchikan will likely be our potentially wettest stop. Distance from mountains and rain shadows having the most effect on amounts of rainfall.
FYI annual precipitation comparisons (highest monthly falls in most of these places in October but September is second):
Ketchikan 140 inches
Prince Rupert, BC 122 "
North Vancouver 96"
Port Hardy, BC (inside passage) 71"
Campbell River, BC (inside passage) 50"