Just south of Point Mugu, in the La Jolla Canyon, Thornhill Broome beach is more suited for the RV traveller (limit: 31').
A long open primitive, clean beach site, Thornhill Broome has a breathtaking view of the ocean. Huge ocean-side rocks and bluffs make for pretty wandering and good bird watching, but the campsite has very little shelter or shade.
Bring sturdy lines to tack down, lots of sunscreen, and a wind-break for your campfire. No doubt I would have liked it better if I was a surfer or body boarder.
Reservations available but not required; camping is $7-11/night, reservation fee extra, dog friendly.