Stay on the ship! I was there on the Hawaii Oct 2012 cruise and like you wasn't interested in any shore excursions. We took a bus that came to the pier that took us to town. It wasn't free but not expensive. When we saw where the 'town' was we quickly made friends with 4 people on the bus who were also on our cruise and stuck together like glue and did not stay in town long. This is not a port to walk around with children. There were a few shops in the terminal but that is it. There is nothing walkable that I can recall. Honestly, stay on the ship!