Airport
If you are traveling from out of state, you will need to fly into Daniel K. Inouye International Airport (HNL).
https://airports.hawaii.gov/hnl/
Rental Car
Rental cars are available at the airport.
https://airports.hawaii.gov/hnl/getting-to-from/ground-transportation/car-rentals/
Lodging
There will be a block of rooms available to book at Kahala Resort. Kahala Resort is more secluded, so staying in Waikiki is a good option as there will be more activities within walking distance for the days before and after the wedding.
https://www.gohawaii.com/islands/oahu/regions/honolulu/Waikiki