Possibly - we're in the Sacramento area, and get as far south as the central coast (Morro Bay / Pismo Beach) once or twice a year and occasionally to Carpenteria State Beach south of Santa Barbara.
Carpenteria's right on the beach and most spaces have full hookups, but it's essentially a converted parking lot (spaces close together) and they book up quickly.
In SoCal or on the central coast, fall should be a good time - not too hard to find spaces in most places that time of year, at least during the week.