Still no word from the EP, but I got a nice email from a person at Kayalu who explained that kayaking at night in Mass is legal anywhere that it's not expressly prohibited but if it's a spot that bans parking at night or something obviously they're trying to deter people from hanging around there after dark. Only thing a yak is legally required to have is a white light on the rear of the boat that is visible from 360 degrees, but she made the excellent point that to bigger boats those probably just look like another reflection of a shore light on the water. Running/nav lights on the front seem like a good idea.