One way to help organize for a bike tour is to gather up the equipment you think will be necessary and put in all in a cardboard carton. This will tell you how much volume will be needed and how much it weighs. From there you can figure out how to distribute that gear on the bike. While not an ultra light packer, I do pay close attention to w hat I haul around and work to keep it all to a minimum. It's going to be a wonderful experience for you.