I travel a lot through there. As you now it is normally safe. But:
Always take plenty of water, some food, hiking shoes, hat, and weapon(Be careful how you stow it because of California gun laws.)
Ah yes, first words out of the mouth of the CHP last few times I dealt with them: "Any weapons in the car?"
Yeah, I live in Nor Cal and drove down through Cajon Pass to visit my son and daughter who live in San Diego. First drove it in the late ‘60s. A lot different then.