So sorry you didn't get to see any whales. They are truly amazing creatures. They must be to get a boat load of people all on one side to stare down at them! :-)
I'm guessing this is the wrong time of year to go whale watching. I believe they migrate in May and sometime in the Fall (Sept?). That's the best time to see them. Maybe you can find information on their habits on-line that will give you a better idea of when to go. Good luck!