Let's hope the weather is warm enough, and dry enough, you'll be living in your bathing suit for most of your trip, but remember...
It may get cold, be prepared.
It may rain, be prepared.
It may be buggy, be prepared.
You might need relief from the sun, be prepared.
Trekking through the wilderness with a canoe, swimming every day (we hope!), and generally taking a vacation from life's cares should mean less of everything - including things like hair treatments, curling irons, hair dryers, makeup, etc. But you must choose for yourself.
It might be a good idea to include a pair of spare glasses if you have them. If yours "fall in the drink," and you require them to see well, you could face a problem.
You may also want to bring along your camera with extra film in a waterproof bag, a small pair of waterproof binoculars to take in the wildlife and other sights you'll see along the way. And if you are a reader, don't forget your favourite novel for settling in at camp at night. After all this is still a vacation!