Take 40 out to Hector Rd. Get off onto National Trails (Old 66) and turn east . At the tracks take the road alongside the tracks on the south side A few miles on you see a road off to the south toward the dry lake. You are now at Lavic on the map. The RR has removed the old crossing of the tracks and the old siding and the remnants of the loading ramps. Turn south and about a half to 3/4 mile down is where I usually go. We usually shoot to the west toward the lava flow. In the past you could take the paved road to where it turned and crossed 40, you just turned the other way and it was only about 1/4 mile to the crossing since removed. You can do that and about a half mile east is a large culvert under the tracks you can drive under, but I've found that the sand can be almost dust and easy to dig your wheels into, the gravel isn't much better and if it has filled in from the storms you might not fit through.
In years past I've seen Marines using that as a back route into the base. Not lately. The Base border is pretty well marked down by the dry lake. The lake is an impact area on the south side. We camped there with the Boy Scouts in 1969 and found a lot of blue 20mm projectiles just over the line.
Another caution, I came too damn close to digging into the pea gravel in the dry creek bed when we tried to drive down to see the earthquake fault line. As long as you stay on or close to the road the surface is fine, the dry creek beds are treacherous. Nothing to get traction on. Evidence of other shooters there, but I've never seen any. Just rockhounds camping several times. Interesting watching the trains at night. They average about 15 minutes apart.
NO WATER near. The I-40 Rest Area water is posted as non-potable. Used to be ok, I think but would not want to bet too much that it is mineral content from the Newberry Springs. Beautiful downtown Ludlow is about 6 miles east via the RR, or any of the roads. Used to be a booming town. headquarters and shops for Tonapah and Tidewater RR, running north to the goldfields east of Death Valley, and a narrow gauge rr ran south to a few mining centers to the south. Now it has the last gas stations between there and Needles. And a few other residents. Some treasure seekers busted down most of the Hotel ruin and the locals are pretty wary of strangers, so if you go exploring there do it toward the west side and stay away from posted areas. It's not quite a ghost town but they don't want to lose any more.