Lonely Planet guidebook:
Oahu Revealed guidebook:
The below table outlines the key differences between our two tours. It's the same Circle Island stops for each, but Pearl Harbor is an additional stop for the second one. If you're interested in Pearl Harbor and want a fuller experience there (~5 hours including exploring Missouri battleship & Bowfin submarine), you could consider doing the standalone Circle Island Tour (Activity 1) on one day and the standalone full Pearl Harbor Tour on a separate day. All tours are with the same highly rated veteran-owned small business run by a Hawaiian family. Please visit the individual pages for all the details, to check availability, and to book.