It is recommended to rent a car to maximize your time and flexibility on the island. A rental car can cost approximately $50 per day. Alternatively, you can take public transportation or hire a private driver, but it may limit your ability to explore on your own schedule.
If you have more time, consider taking a day trip to Haleakala Crater or Kahului to explore the Farmer's Market and the Alexander & Baldwin Sugar Museum. If you have less time, consider skipping Lanai Island or the helicopter tour. Don't forget to pack sunscreen and comfortable shoes for hiking.