I have always recommended the Train. Its only about 1 1/2 of a ride but you get to see and hear a lot about the island. It will point out many sites of interest and if something looks interesting to you, you can go back to it on your own and see it more fully. As far as the sunset thing goes, you want to be there about 1 1/2 hours before sunset. It will be crowded no matter what time of year you go but Fri and Sat evenings are usually the worst nights for crowds. Be sure to see the Silver Man and Dominique and his cats.