ACADIA NATIONAL PARK — Deep inside a nondescript workshop in an out-of-the-way corner of the park, there are unmistakable signs that summer is already on its way.

Each and every weekday, a handful of dedicated craftsmen show up at the sign-making shop tucked in behind the parking lot for the park’s visitor center in Hulls Cove. There they toil all winter to handcraft the many wood signs that help guide visitors around the carriage roads and other places in the park.