As with most desert parks, sunrise and sunset are your friends; if you want to see them in this park, you have to camp there. But just because you've missed first light, don't turn away - a polarizing filter and some wise positioning choices can yield excellent pictures. During the tourist season, little gremlins (children) will likely change your photography experience as they traipse throughout the valley.
Film: Take it slow and easy - there's not much vegetation here to blow around - everything here stays where it's put.
What to Photograph, and When: