6 days in hawaii

Hey everyone, I was looking for some advice on what to do in the back half of my Hawaii trip

I’m doing the NCL cruise and already have excursions planned:

- Maui (overnight): Road to Hana + Haleakela

- Hilo: Volcanoes

- Kona: nothing planned yet

- Kauai (overnight): helicopter tour + Napa Li coast boat

After the cruise, I have 6 extra days and am trying to decide how to split them.

Right now I’n considering:

3/4 days in Oahu (HNL) + 2/3 days in Kona (fly out home from KOA)

But I’m not sure if 3 days in Kona is too much, especially since I already visit both Hilo and Kona during the cruise.

Other options I was thinking about:

Stay all 6 days in Oahu , Do Oahu + Maui/Kauai/Hilo instead (but unsure how much Maui/Kauai would add)

What I am looking for:

- Good beaches (Will visit some on the cruise, but still looking for recommendations)

- Unique experiences (don’t want to repeat what we already did on the cruise)

- Good food is a plus (Heard a lot about Hawaiian food, but I’m vegetarian, so that probably changes things)

Questions:

- Is Kona worth 3 full days after already visiting Big Island on the cruise? (Ig I can do mauna Kea)

- Would Maui/Kauai still be worth it even with our current plans?

- Is Oahu enough to fill 5–6 days without getting bored?

Would really appreciate any advice (even criticism on my plan so that I can improve it).

Thanks!