Travel Note
Warren is a small town and we recommend grabbing a hotel or airbnb nearby in Camden, Rockport, Rockland, or Thomaston. There is no public transportation, so you will definitely need to rent a car or carpool. Connecting in Boston: You can fly into Logan Airport in Boston. You can either rent a car and drive up (3.5-4 hour drive) or take the Concord Coach bus, which leaves every hour from Logan. Take the bus to Portland. You can then either rent a car to come the rest of the way (1.5 hours) or connect to the coastal bus which will drop you off in Camden/Rockport at the Maritime gas station. You can also fly into Portland or Bangor, both of which are 1.5 hour drives and also will take you to Camden on the Concord Coach. Owls Head (30 minutes away) also has limited flights. Unfortunately, other than the bus there is no public transportation in the area. It is somewhat rural and not walkable. You will need to carpool or rent a car.
House Or Rental
For a little less money and a lot more adventure, consider camping at Camden Hills State Park.