Hi, you will see all of Milford Sound, including the sights down through the rainforest to the water at the beginning of the sound where we met up with the ship.  Then you are on board the ship as you exit the sound to see what you missed.  Our tour group was small and it was more like a private tour, but our guide said the next sailing had 3 buses booked so far, so it is a very popular tour.  Our sailing was during the holidays so we were already paying a premium for the cruise and airfare, so