In just a few short days me and my 5 best female friends will be traveling to Disney World and staying at the Sheraton Vistana. Because we are only 19 years old we cant rent a car. Although we have a car service picking us up two and from teh airport, im concerned about teh quality of transporation offered by the resort to and from the parks. Can any one who has stayed there let me know how it works, how often the buses run, if buses run to pleasure island late at night (2am), etc. Thanks!