Don't take it personally - you've been out there, I lived there - no biggie. I was just pointing out that its not a paved road.
We have also dabbled on the other side of 191. Of course, then you are WAY beyond the 5 miles (which is still possible, as they didn't use too many mileage markers), and there is alot of brush across 191 on the other side.
What always bugged me was where they went to from the area. There are at least 3 stories (that are good possibilities). Also, the trip they took BEFORE the robbery - from the town of Willcox (the old general store) with their supplies for doing the deed, and different stories of where they went, where they stopped, and where they holed up.
Of one of the stories, there is an older guy in Willcox who actually went up into Dos Cabezas and found a cave that had an old saddle and some old food supplies - could be connected, maybe not.
If you go to the ranch that they stopped at, all three stories start looking a little weird, because it looks like they would have gone in the wrong direction (and the further across 191 you go, the further wrong they would have been going), or made one huge circle, of at least 15 miles, in which case, with all the people out to get them, would have been extremely difficult.
Its a VERY interesting robbery, to say the least.
Google Earth may help, but, after living there, I can tell you that the dry lake is not always dry, and it looks different every week, depending on the weather, wind, water, 4 wheel drives and ATV's, and I prefer "boots on the ground" to my GPS (I use the GPS to mark things when I find them, so I don't lose them

)
Anyway, I thought you were looking for information.
B
Here is a couple of pictures of the train station I took about 5 months ago. (I like to play with black and white and sepia tones)