Anything (weather), anywhere (location) :-)
I was there end of april 1999. Rough Guide sez camping should be closed half april/may because it would be too hot...
Spent one cold night in a tent, the other night in a motel, decided to leave because ... it was too cold and it rained... (REALLY!). Upon leaving, the weather improved to relatively cold and cloudy (dramatic photography!) and comfortably sunny. Spent about 5 days there, Death Valley is AWESOME!
So, you will have a problem finding a location that does not distract too much from your models :-)
Saw the homepage of your website, I guess you won't go far by foot with all your equipment :-)
Many gorgeous locations are within close distance of a parking, many are just the main well known spots, all depends on what you want to do.
Zabrisky Point (if you really like, you can walk up to zabrisky from the bottom of the valley, I believe there is a track with "Golden" in it's name).
Bad Water (salt flats)
(I believe it is called) Devils Golfcourse, in the direction of Badwater, salt crusts in "heaps". Very out-of-this world but beware: VERY sharp!
And somewhere in the middle of the valley (near Stovepipe Wells, not the town near Zabrisky?) is something called "Marble Canyon" (or like that).