A native Californian and longtime RVer, I agree with those who caution you about traffic. Travel is about time, not distance. I live in Anaheim (think Disneyland) about 28 miles from downtown LA. That trip can take up tp two hours at certaintimes of the day. Check out Dockweiler RV park in Playa del Rey. On the beach, near LAX. Good location for daytrips to LA-based attractions. Orangeland RV in the city of Orange is a great place for Disneyland, Knott's Berry Farm and the beaches. Bolsa Chica State Beach is on the beach with full hookups but tough to get reservations. Keep in mind that there are more than 10 million people in the five-county LA Basin so RV spaces are in high demand most of the time. In the San Diego area, check the Chula Vista KOA. Great location for the zoo, Sea World, USS Midway, etc. Enjoy your visit.