i wanted to give folks a heads up to research if they are renting a car in Oahu. We arrived yesterday and waited an hour for a car with Hertz even though we had pre-booked, along with about 50 other families. Only while waiting frustrated did I read the reviews to see this was a common occurrence. Once we got a car it wasn't even cleaned before being given to us.
FWIW if you are a Hertz #1 club member that seems to have been the trick to actually having a car available when arriving.