A stout pocket knife is perhaps more useful than a sheath knife. A sheath knife with a blade about four inches long may be chosen by some. A longer blade is not very useful and tends to get in the way. It is a good idea to carry wooden matches in the woods, in a waterproof box. Shampoo with perfumes and other added ingredients is not recommended.
Some insect repellent is necessary.
Make certain you are not allergic to the brand you choose. 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.