We will be on the Celebrity Century cruise from San Diego to Hawaii Nov 19 to Dec 4. I don't really like many of the excursions offered by Celebrity. I've become rather frustrated trying to find excursions offered on-line by private companys. They don't seem to time-up well with the arrival and departure times for the ship. Does anyone have any suggestions and/or recommendations? Does anyone know if the private companies have boothes/offices set up at the ports (like in the Carribean) where I could just wait and book something when I get off the ship?