I also did the pearl harbor tour - az, Missouri and punchbowl tour thru the tour co versus going on my own. I went oct 17th and they were closing early because of the incoming hurricane. We had tickets for the 10:30 "show" so we went to the punch bowl first, then to pearl harbor to see the AZ. There was time to walk around before going out to the memorial. We then went to the Missouri which is on the navel base there. We had lots of time to walk around after the 30 minute tour, but by then it was about 1pm and I was starving, so I spent some time eating. got some great pictures and felt it was worth the money versus me going alone (I had a rental car for the week).
My case ended up being a little special, since the hurricane shut things down for the weekend. If I hadn't booked the tour, I might not have been able to go or get tickets, since it was closed that weekend and I was there Thursday to Wednesday (arriving mid afternoon and leaving late afternoon on said days).
I also did the majestic circle tour on my birthday (the 19th). It was still raining from the hurricane and the tour was not cancelled as we had the required 10 people. It was cut short, since 2 of the places we were supposed to go were closed (Diamond Head and Wiamea Falls - sorry didn't spell that right) and so we spent more time at the Dole plantation, but by then only the gift shop was open!
The ladies at the tour desk are great! I also signed up last minute to do a surf lesson, and my group lesson turned private, so I got a great price!