The key for island hopping is to pick an early morning or after 5 flight, those hours the airport, rental cars and hotel check in, are emptly and you zip on thru, flights are also cheaper. If you get a flight around 8am, you will be at aulani pool by 10 and not waste a day, check your luggage and enjoy your day. Do not take a flight between 11 and 3, the OGG airport will be a total mess. Yes you have to get up early, but you will regret a mid day flight