In rural Vermont, near a cheerful little creek, sits a picturesque, 200-year-old barn. The barn is a traditional affair, with big doors and a metal grain bin and stables and a restored interior with surprisingly good acoustics. This is the home of BARN OPERA, a little company that has announced a big move: Next season, BARN OPERA will partner with other arts organizations around the state to present touring opera productions. “The ultimate goal is to have one annual production within a half-hour drive of every Vermonter within the entire year,” said Joshua Collier, the company’s artistic director.