Dr. Melanie Cain, co-founder and artistic director of Fresco Opera Theatre, spoke with Ava Borelli about upcoming performances of Opera on the Point, a show that turns the fire circle at the end of Picnic Point into a stage of firelight, storytelling and song. Performances are Sept 20 and 27 at 7 p.m. Audiences gather around a roaring bonfire. This year’s show, Whispers from the Woods, brings to life the spirits said to inhabit the woods and water: witches, dryads, water spirits, and the mysterious orbs of light that drift along the peninsula. Plan ahead for a 1-mile walk to the fire circle at the end of Picnic Point. Information about the program, ensemble and setting can be found at Fresco Opera…