I am aware of all the air force bases in Southern California and Nevada because I have lived here for 64 years.
Well then you should be aware that the airspace over the high desert is tracked and monitored by many overlapping air traffic authorities. You must also be aware that there are roads criss-crossing the desert and people living here, there, and everywhere. A four-engine cargo plane would cause an insane amount of ruckus touching down on a dry lake bed anywhere in Southern California. Small planes may sneak in and out of West Texas or Southern Arizona, or the Florida Keys, but not Southern California, and certainly not large cargo aircraft.