My good friend Dave runs the Subway in Bar Harbor. Boy, this guy puts in a lot of hours making sandwiches for hungry tourists and locals alike. Interesting enough he tells me that he gets really busy early in the morning around 9 am. Seem to early for a sub? Well, clever tourists going on boat trips, hiking, to Sand Beach etc, stop in and get a sub to go for later on in the day. This way they don't have to worry about trying to find a place to eat later in the day.
In the off seasons the Subway is about one of the only quick places to grab sandwich to go. Check it out. The Bar Harbor Subway is convienently located next to Ollie's Trolley.