To fully enjoy your trip, it is recommended to rent a car to get around Bar Harbor and Acadia National Park. There are several car rental companies in Bar Harbor, including Enterprise and Hertz, with prices ranging from $50-$100 for a day. Another option is to take the Acadia National Park Loop Road or use the free Island Explorer shuttle that connects various points throughout the park and downtown Bar Harbor. The shuttle operates from late June to mid-October and is free of charge.
If you have more than one day, consider extending your stay to fully explore Bar Harbor and Acadia National Park. If you're short on time, consider skipping The Abbe Museum or Bar Island to make the most of your day.