What???You can't get a day pass anymore for Yosemite????Wow,We used to go all the time with no reservations!! All you did was go to Camp Curry,and ask for a cancelation,your in!!! You definitely need prior reservation tickets for Alcatraz!!As for SF<park your car in Concord and take B.A.R.T.to SF,and have a little exercise while you tour the City,Bikes are best!! The Cliff House area has become a target for homeless trash that prey on tourists!! Leave NOTHING showing in a car there,put everything in the trunk!! And that goes for everywhere here in NorCal>Beware or be bare,California is no longer a safe place,anywhere!!! I know,I was born here!!