Large parking lot with numerous vans camped out. The travel plaza is operated by the Maine Turnpike Authority and is accessed off the Maine Turnpike toll road, but paying $1 is pretty reasonable for a campsite.
There was a 4-Hour time limit on non-commercial vehicles, and a 12-hour limit on commercial vehicles. There is a food court and a small shop which looked okay, but the bathrooms were very messy.