Good luck finding anything.
You'd have to go inland to find anything.
I lived just north of Malibu for 15 years and beach sites are reserved nearly year round months ahead.
And I guarantee you that law enforcement patrols beach parking lots for those attempting to crash overnight.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package