Getting around San Diego in a car can be stressful.  A GPS is helpful but be prepared for a little traffic.  Parking sucks but not as bad as New York.  If you plan to visit the sites park a ways from the entrance and you should be OK.  I don’t plan to visit more that once a year but when I do I try to allow for traffic.  The worse traffic is at 5pm Monday through Friday.  San Diego is a great place to visit or live.  The real estate is not cheap so don’t expect to stay on the cheap but the price of admission is worth it.  The  reviews of occidental vacation club say San Diego is the place to visit.