Ok – regarding walking out to get help:

Here is a possible way to survive if you were her trying to walk out, but you'd be making some assumptions which may dangerously shorten your water supply. These are coordinates from the intersection where she headed west off of Owl Springs Road and continued down the old jeep trail in the wash towards the west. she got stuck soon after the intersection (NAD83 Lat/Long decimal degrees - just copy/paste these into GoogleEarth): 35.6908°, -116.908°

You can see from this point on GoogleEarth how desolate this location is. Even GoogleEarth shows a neat little road line leading west down the wash from this point that connects to the other dirt roads at China Lake - this road is not there anymore, and I bet her GPS showed it was there too!

Anyway, the automated radar facility about 2.3 miles north at the end of the road from the intersection probably has an alarm if someone tries to break in – it would offer a good possibility for calling for help. Other than that, you can see she was really out there and walking anywhere would have been really bad!