(STOCKBRIDGE, Mass.) – Bluegrass outfit the Picky Bastards and singer-songwriter Mikey Sweet will kick off Chesterfest, a new Friday night Americana music series at Chesterwood, on Friday, July 11, 2014, at 6:30 p.m. The summer-long series will include a wide range of contemporary American musicians, from folk, alt-country and rockabilly to garage, punk and…