Map, compass, water, extra food (more than you think you'll need.
Extra clothing, fire-starter (Petroleum-soaked cotton balls in a film canister, package of dryer lint, commercial fire-starter product), matches and knife.A first-aid kid (with basics - Band-Aids, pain-killers, antibiotic cream) - and such items specific to your needs as eye ointment, etc.).
A flashlight with extra batteries and bulb.
And sunscreen and sunglasses.