It's recommended to rent a car to explore the island. Expect to pay around $50 per day. Taxis and Uber are also available, but can be expensive due to the limited number of drivers on the island. It's important to factor in traffic as well, as some areas can be congested during peak times.
If you have more time, consider taking a day trip to the island of Niihau, also known as the "Forbidden Island," where you can experience traditional Hawaiian culture. If you have less time, skip the helicopter tour and plan to visit fewer attractions in a day to avoid feeling rushed.
Kaua'i is served by Lihue Airport (LIH), located in Lihue, which is approximately 3 miles from the city center. There are several car rental agencies and taxi services available at the airport. It's recommended to book your transportation in advance to avoid wait times.