Rather than just going on a helicopter tour, go and have a lesson with Mauna Loa Helicopter School. Not only do you get a great view of the local area but you also get to fly a helicopter with the doors off and add (perhaps) a new experience to your logbook. Take an R44 and then you can take someone else along for the ride; they'll definitely enjoy the views of Pearl Harbor as you make your way back to base :-)
I have no interest in Mauna Loa Helicopters other than having had helicopter flying lessons with them and being a happy customer.