Never been to the west coast before(from NYC), flying into San Fran 7/10 and leaving San Diego 7/21. Looking for advice on some hidden gems/activities that shouldn't be missed while making our way down the coast. We have a travel agent ready to book out hotels but are trying to come to grips with how long to stay in certain areas. We are more of a sightseeing bunch that loves nature and good casual dining and some fun nightlife. Any suggestions are welcome on spots to go and how we may be able to economize this trip as best as possible. Thank you in advance for your input.