I basically lived in my collection of Topo Ranch trucker hats and tanks for seven days and cut a few pairs of jeans into shorts... exactly what you do in Hawaii.  It was the perfect ending to our five week trip around the world. If you make it to the island of Oahu, I suggest renting a car for a few days and spending some time on the North Shore. Huge waves, tons of surfers, beautiful, white sandy beaches, and not as many tourist trap stores and restaurants! Aloha!