How's your portaging? Unless you can reply "regularly practiced" it'll be worth it to test and refine your system before you go. The portages often feature as the worst part of the trip, with tears and later-regretted words in some cases!
Remember there's a 60 lb weight limit for extra gear on a cart, often some has to go into packs.
What a great trip report Westcoast paddler. Thanks everyone else for the advice. I realize a canoe might be a better choice but I still like my necky amurk tandem kayak best. We're backpackers so we stick with the same gear when paddling. Our backpacks usually weigh around 60 lbs combined so we don't have to carry much when portaging.