We wanted to do a hike on MDI in Acadia. Our plan was to start at one trail head and hike to another without coming back to the start. The Island Explorer Bus made that possible without us having to shuttle cars.
We used it one other time from Schoodic we took the bus from Schoodic Point to Winter Harbor and connected with the ferry boat and went to Bar Harbor. From there we connected with other bus routes and went to Sand beach. How very nice if you are not in a hurry, and well you are on vacation so take a slower pace.