You can stay at Hilton Hawaiian Village where the wedding will be held and you can use the offer code listed on the Travel page. You can also stay at other hotels or Airbnbs in Waikiki. If you decide to stay outside of Waikiki, you will likely need a rental car or Uber/Lyft.
If you want to see more of Oahu than just Waikiki, you will probably need a rental car or use Uber/Lyft to get around. There are multiple rental car companies at the airport - Hertz, Dollar, Avis, and Enterprise to name a few.
Flights near the holiday season can get expensive so we recommend booking as soon as you can confirm your travel arrangements. If you have the availability to stay longer, flights leaving Hawaii will be cheaper after new year's day.
You're welcome to arrive before the wedding to explore Oahu and other neighboring islands. Alternatively, we recommend staying a few days after the wedding to enjoy the spectacular new year's eve fireworks.