Health and Safety
Even if you're not hiking, carry durable rain gear made of a breathable material, and dress in layers. Good, sturdy, broken-in hiking boots, a hat, and warm gloves are a must, as are polypropylene long underwear and layers of wool or fleece for hikers. Avoid cotton. Bring insect repellent, binoculars, and a camera. Park water isn't safe to drink, and past the park entrance there's no food except what you bring in yourself. If camping or hiking, don't forget to bring a mandatory bear-proof food container or borrow one from the park headquarters.