Take me, and I will give you all the information I have.
But seriously, my cousin lives there, I will message him and ask him what he recommends. (When I was there in 2010, he had a Porsche, so he should know some good roads.
He took me on a tour to a bunch of great spots, but I only had 11 hours on my layover to Fiji, but I liked it so much, that I rerouted my return trip to stay a couple of more days.
If you have the time, I know he will say to plan on going to Kauai. Our plan was for me to transfer to Kauai and then we would trade houses for vacations.
That plan hasn't came to fruition as of yet, but someday. He took me surfing, had me actually up on the board, albeit briefly. ( I would have surfed more, but that was brutal getting myself paddled out to the good waves using only my arms.)But Ted's on the North Shore was great food, (must get pie) and not generally too touristy.
I will let you know what I find out.