By plane
Nearest major airports are the Hancock County - Bar Harbor Airport (http://www.bhbairport.com) near Ellsworth about 20 miles, Bangor International Airport in Bangor about 30 miles and Portland International Jetport in Portland about 120 miles. Even if you fly, you'll need to rent a car at one of these airports.
By car
You will most likely enter Maine on Interstate 95, especially if you are coming from southern New England or U.S. points beyond. The standard routes to Downeast Maine are to either follow I-95 to the capital, Augusta, and then to break east on state highways, or to leave I-95 around Brunswick, Maine, and follow U.S. 1 north along the coast toward Ellsworth and Bar Harbor. The drive along U.S. 1 is typically more scenic, but also generally slower.
By ship
Blue Hill does have a pretty tidal harbor on Blue Hill Bay that is fairly sheltered from the open ocean. The K.Y.C. yacht club welcomes members of other yacht clubs, to drop anchor there and to come ashore. K.Y.C., however, is located some distance from the center of town, and it might be preferable to ask for a ride to go shopping. There are several boat yards in Blue Hill, offering their services. By road, Blue Hill is approximately 45 minutes away from Bar Harbor. The high-speed car ferry "The Cat" (http://www.catferry.com) links Bar Harbor with Yarmouth Nova Scotia, Canada.