That all depends on the type of person you are and what else you want to do. If money is an object and a guided bus trip is not desired, you could take TheBus 20 or 42 for $2.50 each way. Takes about an hour. (Walk back to the main street for the return trip. Use the transfer to stop off at the Ala Moana Center's Food Court) It is the way we always do it and have always obtained free tickets for the launch by going early. They open at 7:00AM. If you wish to go around the island, you could rent a car for less than a tour bus for multiple people. Of course you will need to do a little research.