What's the best way to travel around O'ahu?
Traveling up to the wedding we would recommend renting a car for those days up north. If you are in Waikiki most of the time, ubers & lyfts are available. You can order an uber to the North Shore, but you will have a hard/impossible time getting one to take you back into town.
Where should we stay on O'ahu?
We recommend finding an Airbnb or Vrbo in North Shore for Friday and Saturday night, check near Hale'iwa and Waimea Bay. If you are not participating in the rehearsal dinner Friday day, then one night in North Shore is perfect!