My husband and I just booked a six-day trip to San Francisco in June. Our son will have just turned one, and this will be his first plane trip. I don't know if he'll be walking yet or not. What's the best way to get around San Francisco with a one-year-old? Are we going to have to take taxis everywhere? Can we take a fold-up stroller on the trolleys? What about BART?
Unless we change our minds, we'll be staying in Japantown. (Got a good rate, and since I've lived in Japan before, it seems fun.)
Thanks for any advice!

