Where should they go?
Do android’s dream of electric sheep is a great book. I would also recommend Dr Blood Money. One of my favourite books. Purely for the bizarre writing content its truly unlike anything else.
LA/San Diego is a great place. But I hope you did not pass over Orange County, the OC, without seeing and appreciating it, The OC is right in the middle of LA and San Diego. The OC is really the place to see.