The park is amazing, with tons of history, vegetation, museums, etc. I highly recommend visiting the park, plus its free! We were actually at the park during the Outside Lands Concert, but during times we didn't want to see any of the music acts we would wander around the park. We did see the Conservatory of Flowers and the California Academy of Science which are awesome!! I am not sure what parking is like, but talking the Muni is really easy and cheap.