We have a week that we can spend in San Francisco and the surrounding area before we go to Yosemite and then head South towards LA. Are we better to spend say 4 nights in SF then go North somewhere for 3 nights or does it make sense to rent a place in SF for a week and do day trips out? Clearly if we are going to drive out we will need to deal with having a car in SF for part of the week. Appreciate your views. Thanks.