Island Hopping
If you have a week or more on Maui, you may want to set aside a day or two for a trip to Molokai or Lanai. Tour operators such as Trilogy Excursions offer day-trip packages to Lanai, which include snorkeling and a van tour of the island. The Expeditions Lanai ferry has room for your golf clubs and mountain bike.
If you prefer to travel to Molokai or Lanai by air, and you're not averse to flying on smaller prop planes, book with Mokulele Airlines for flights to Hana, Maui, and Molokai.