HAPPENIN’ OTSEGO for WEDNESDAY, OCTOBER 31 Halloween Parades HALLOWEEN PARADE – 5 p.m. Showcase your Halloween best with Cooperstown Central School band leading the way. Followed by cider and treats at Cooperstown Chamber of Commerce, then trick-or-treating at around Cooperstown. Start at Cooper Park, Cooperstown. 607-547-9983 or visit cooperstownchamber.org/halloween-2/ PARADE – 7 p.m. Celebrate Halloween. Costumes encouraged, includes Oneonta High School Bands. Line-up at 6:15. Main St., Oneonta.…