That's good to know. Thanks. The local warehouse is actually close to my office.
It's worth looking into. As I say, you have nothing to risk by joining.
If you have time ahead before your trip, buy the book Oahu Revealed, by Andrew Doughty. It's the print version of the online app mentioned in post #7 above. This is (arguably) the best travel book available, because it's based on "real world" travel. They don't accept advertising, so what's in the book is something they think belongs in there. The maps are organized by mile markers of the roads you're driving on, so it's easy to navigate around. Paired with the online app, you can ask things like "What's near me right now?" and it'll let you know what you're near. If you can't get the book before leaving home, they do sell it at Costco in Hawaii. Well worth the discounted price. Reading ahead may give you a lot of good ideas of places to visit, many of which are free to the public.
https://www.hawaiirevealed.com
Punchbowl is the name for the National Cemetery of the Pacific, a very interesting place to visit, located inside a volcanic crater in central Honolulu.
https://www.govisithawaii.com/2011/02/28/oahus-punchbowl-national-memorial-cemetery-of-the-pacific/
I know this thread was started about the Go Oahu card, but you may want to decide if you'll "really" use those attractions. You may find you're "forced" to do things you might not care about, because they're included with the card. For my money, they are often not worth it. Note also that the card only includes admission to ONE of the "Premium Attractions."
You mention going to the Polynesian Cultural Center. To get your money's worth on this, you have to plan your day quite carefully. The park doesn't open until 11:45. At 5:00 it basically shuts down so they can get ready for the luau and evening show. Between those hours, if you intend to visit each of the six villages, to see demonstrations and such, you cannot dawdle, and you have to keep moving. Things are performed on a schedule, and you have to make sure you're in the right place at the right time. If you miss one, there isn't time to circle back and see it again, unless you skip something else. It's interesting, and worth seeing if you are interested in learning the differences in the various Polynesian island cultures, but if you arrive late, you may find you spent a lot of money for something that isn't quite that satisfying. The luau food is marginal and pretty bland. (Very "sanitized" in keeping with the Mormon Church's rules. No alcohol is served.) The evening show is quite entertaining, but hula and fire knife performers are pretty commonly found, if you check around. After the show, it's a long drive back to Ko'Olina. (My opinion does not necessarily reflect the opinions of the Management.
) Here's their website:
https://www.polynesia.com
Is anyone in your group Active Duty military, or retired military? You can save a lot by checking the ITT offices on the bases there. Well worth exploring, if you're eligible to buy tickets from them:
https://jbphh.greatlifehawaii.com/tickets-travel
Dave