since nobody else said anything, here is my 2 cents.

in maui, go for scuba diving at molomini,you'll see many kinds of fish, hills under sea, and whales jumping on the way there;

then drive up haleakala(?), which is more than 3000 meters above sea. you'll see clouds and vocanoes below you. you can even ride a bike down;

drive up northwest to kahana, see some rain forest land scapes;

if you still have energy, drive down hana, in the evening. hahahaha...

generally food is expensive but bad...

hope these are helpful.