My father and I took the Oahu Circle Island Small Group Tour yesterday (as we arrived in Honolulu recently). This is a tour I can highly recommend! I think the max number of people is 11 and we had 8 delightful co-passengers during our tour. It is really worth it in my opinion (in terms of time and money) to drive around the island and see the major sights throughout the day. You can always go back and spend more time in any given place that tickles your fancy. More importantly, our guide, Bryce, made for a very pleasant and relaxing tour, reciting his encyclopedic knowledge about Hawaiian culture, geology, traditions, and mythology. Hi recounted epic stories of the island's formation and native beliefs about the gods and ancient history. He knew the details of every stop and even recommended the best shrimp truck scampi I have ever tasted! Moreover, I couldn't stop laughing, as he has a quick it and good sense of humor about all things. If you want to get out of Waikiki for a day and really learn about the island of Oahu, I strongly recommend this trip. Your time will be managed very well. And if you are fortunate enough to have Bryce as your guide, you won't be disappointed.