Polynesian Adventures can take you on a tour of Hana or a tour of Central Maui and up to Haleakala. They also have a tour that will let you experience sunrise at Haleakala Crater. Don't forget to dress warmly for that tour! If you book online, they give you a 10% discount on tour prices. They have been in business for many years, and have a good reputation on all islands.
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