Visitors to Camden Hills State Park can summit Mount Battie, leaf-peep in the fall, or cross-country ski in winter—all with fewer crowds.Panoramic views from Camden Hills State Park in Camden, Maine.Credit: Richard Wood/Getty ImagesMaine’s rugged coastline and forests have long drawn nature lovers to Acadia National Park. But travelers seeking a similar experience with a bit more breathing room may find Camden Hills State Park a preferable optio…