Tripod / Extra Film, Death Valley National Park
Miscellaneous: If you are doing a day hike just bring plenty of water!! That is the most important thing to bring. Next you'll want to pack some sun screen lotion, and finally you need to bring enough film for your camera (unless you use digital). You'll find there are more potential photo oppurtunities than film you can carry.
Photo Equipment: Bring lots of film!!! You can't drive more than a few minutes before yet another spectacular landscape unfolds before you, insisting that you pull over and snap a photo.