Did Amelia really go to Las Vegas, specifically, to receive the Electra for tax purposes, or just to the general area near Las Vegas, or just over the state line into Nevada?
Also, does anyone have access to a vintage antique Jeppesen book listing airports. He first published an initial version of his 'little black book' of airport information around 1934 our of his basement in Utah. Since he lived nearby, he may have a fairly complete listing of airports, even minor ones, in that part of the west. It might even have a description of the airport surface that matches what is in the photos - unpaved, dirt, no rocks, no grass, weeds and sage, houses nearby.
I've never seen an early Jeppesen, but from what I've heard it might have details that will help identify the airport, such as houses within walking distance where one might find a phone, transportation into town, a place to stay, or help and/or fuel. The airport of the photos looks somewhat inactive. The weeds are up and are not flattened from traffic, taxing, or dead from the shade of parked airplanes. The low camera position makes the hanger look overgrown, because the camera is positioned right down on the ground. The hanger doesn't appear to have much in it, but there is visible the root rib of a large wing.