Jude...you will still want your GPS in this area. Pretty remote from services. Either Ridgecrest to the north or Kraemer Junction to the south. A whole lot of Mojave desert in between.
I am actually headed to Ridgecrest next Sunday to do this specific trail along with Last Chance Canyon, which is a part of the Red Rocks area.
Also, south and east of the area is Randsburg ghost town/OHV park, a really cool area as well.
As both Marshann and Irwin suggested, a good trail book for the area is vital for hitting the POI. Google search Last Chance Canyon for some leads, and then hit Amazon.com. The Charles Wells book has a trail guide for Last Chance Canyon in the back as a supplemental description.