12 feet is a pretty small canoe, I guess you are familiar with it but it seems to me that a boat that small wouldn't have the capacity for the gear for that long of a trip.
Put your gear in waterproof bags and tie anything you want to keep to the boat. I lost a handgun in a capsize, so after that this was a hard and fast rule for me. Years later I was starting on another trip, me in one boat and a couple of inexperienced kids in another. I had told them to tie their stuff to the boat, but noticed that as we pulled away from the launch point they hadn't done it yet, so I told them again to get their stuff tied down. Sure enough we hadn't gone a quarter mile when they hit a bridge abutment and rolled the boat, and their stuff went everywhere.
I float differently than almost anybody else. I keep my boat sideways to the current. I figure out where I want to go and a few flicks on the oars moves me back and forth across the river to where I want to be. If there is a chute or narrow spot, I can turn the boat fore and aft to the flow with a touch of the oars, but then I always turn sideways again when the river is wide.
Floating rivers is one of my favorite things in life, you've got me all enthused, I gotta do another one this summer.