All you Hawaiian vacation copycats
@ImJustKCClone you will probably want to rent a car and I'd do that once you have your lodging booked (sounds like you do). Rental cars tend to go a bit faster since pretty much everyone gets one.
Not sure if Pants has other suggestions, but we used this site to reserve ours. You don't pay until you pick up the car. They had the best rates and because you don't pay til you show up, it means you can keep checking the price, see if it goes down, cancel your reservation and make a new one if you want.
https://www.discounthawaiicarrental.com/