The state parks are likely already reserved. In the S.D. area, my first choice is the adult park Bernardo Shores in Imperial Beach - but think Coronado. Second is Chula Vista RV, but they will be packed if they still do the Christmas light thing. I avoid Woodstock - the nickname for Camperland. Mission Bay RV would be okay, this time of year but is a distant third. Check the Oceanside RV parks for a rig your size. And certainly check rvparkreviews.com. Might also check some of the parks in the general area of Disneyland. Truth is, that So Cal Real estate, especially anywhere near the beach, is too pricey for RV parks. Case in point, Bernardo Shores RV will likely be a very pricey condo complex before too very long.