<S> Gents,
My family and I will be visiting San Francisco on Aug 11th and Aug 12th this year. I was hoping to take them to the Alcatraz Island visit with audio tour (I already did it in 1998) but I noticed yesterday on the Alcatraz Cruises website that those dates are already sold out

Are there any alternatives? What would you advise us to do?
Thank you for your time.
deSelys