A small one using two size AA or AAA batteries and measuring less than six inches overall is recommended. Minimags are excellent. Bring extra batteries and bulbs. It will be difficult to replenish the supply. A sunscreen rated at 15 or higher and sunscreen chapstick are helpful on canoe trips.
Some sunscreen is necessary.
For clothing, rain gear, sleeping bag, and air mattress. If you have some, bring them. Required for certain courses. Be sure to bring enough film. If you want film processed while you are in camp, get the necessary mailing envelopes also.