If you've been to Oahu 3 times, why not just go to Maui or some other island for the majority of your trip?

A day trip is a big hassle. Get up early to get to the airport, fight TSA and lines at the airport, fight car rent lines at the other airport and get on the road by what, 11am or noon? Then you have to fight the same airport battles that evening for a total of 6-7 hours on the other island... Bleccchh

Try out Maui or Kauai or The Big Island for several days or your whole trip.

And remember,

Maui no ka oi

Safe travels,

Doc