No offense but that's a bad plan.
Google maps functionality is spotty to non existent in places like Anza-B, Joshua or DV. It either will barely work, not work at all or work badly and send you in the wrong direction.
Death By GPS In The Desert
'Death by GPS' in desert | The Sacramento Bee
Instead use a back country navigation app. There are many. I use Backcountry Navigator Pro for Android. It has all the government maps and most are downloadable for free. You download the maps at home and then when you are on the trail and have no data service, the App uses the GPS plus the downloaded map to function. It also accepts basic GPS coordinates so you can pre-enter all of the locations posted above. Before trips I usually pre enter the important spots and drop a pin then use the Forrestry Service map for roads. It works great.