Well sure don't want to change your mind if set on a water taxi..but I haven't heard of any ferry problems lately and would wager 100-1 odds that if you are at the Roadtown ferry dock at 930... You will get to STT before noon..check luggage at Taxi stand outside customs .. Walk a couple blocks over to Hook Line and sinker Have a nice lunch..back to taxi stand ..to airport. If leaving on Saturday and want to do the 3 hrs before flight thing..skip lunch. It's 35 bucks each .. Can eat and party on the difference.