We chose the night tour based on reviews and we're glad we did. The only problem we saw with the night tour is that it was very crowded! Even the tour guide made a statement about it being a large crowd. The crowd did make it hard to move around within the prison and created some long lines to get on and off the boat. Otherwise, the tour is very neat. The self-guided audio tour allows you to complete the tour at your own pace. The audio tour lasts only 45 minutes but you are on the island for 2.5 hours, which is really too long. It would be nice if they offered multiple departure times. It is a very cool and windy ride to the island if you sit outside. The majority of people sat inside for the ride back to the pier. The time and money is worth the tour to see such incredible history.