Booked before we travelled ,so called into the fishermans wharf office,the lady was very helpful allowing us to use the wi fi to download and print tickets,given instruction to the alcatraz crossing etc.Day of the crossing,everything went really well,you wonder if all the people in the ferry que will get on board,but they do.Alcatraz was very interesting and is a must see.The following day we decided to do the Sausilito route,which we found good and spent half the day there,more chilled out than the bussle of san Fran which was a welcome break,you also see the bridge in great detail and hear the history which was excellent.All round well worth the money it cost for the two day tour and would recommend,thanks Big Bus company and all your staff.