Hi, I'm trying to plan a holiday visiting Las Vegas, San Diego, Los Angeles and San Simeon (to see Hearst Castle) late September/early October. I haven't booked anything yet and would appreciate any tips from anyone who has been on a similar trip. We will be flying from the UK. I want to be as economical as possible with the mileage and can't decide where to start and where to finish. We could do San Diego, up to LA, up to San Simeon and finish in Las Vegas or the other way round. We could stop at other places overnight to break up the journey. We have been to California and Las Vegas before but never driven from one to the other.