You cannot do the whole island in the amount of time you are given ashore. Therefore, you must pick which side of the island you want to see. I chose the North Shore (Princeville) area and there is plenty to see. That is the green side of the island. We hiked Na Pali area and went swimming and saw two waterfalls. We had no problems getting our rent a car. Always call ahead and tell them you are with the boat. They seem to go faster. Kauai is very green and beautiful. Interested in becoming a travel agent? Follow this link to find out more. Home Based Travel Agent