Considering the Jeep? Stop looking for anything else because this is a guaranteed perfect fit for the island!
My girlfriend suggested we look for a jeep and after driving with the top down 4 days in a row, we requested another day which Kinsley approved it within 5 minutes! He was charming and pleasant to meet and his jeep was amazing.
It is ready to tackle trails with 32" mud tires and a winch the will get it anywhere! (Though the craziest thing we did was pull over on the dirt shoulder)
Best part is everyone thought we were locals! Tons of waves from other jeep owners and no rude honks (not sure if that even happens in Hawaii- I'm from San Fran and Seattle)
Kinsley has a cot in the back which might limit storage but is a huge plus if you want to do some camping. We unloaded it in our friends house and had plenty of room for cooler and beach stuff whenever we went out!
I'm Craigslisting jeep wranglers daily now.
Enjoy your rental, nothing like taking the top completely off and jamming out cruising around Hawaii!