Five years ago, the Community Closet thrift store hauled a truckload of eclectic vintage clothing 500 miles over the mountains to the inaugural Treefort Music Festival in Boise, Idaho. The Closet’s popup shop — on a downtown street, surrounded by live indie music — was an instant hit. Band members and concertgoers found items they loved and spread the word, giving rise to its reliable and cherished presence at Treefort every year since. “I bought a beautiful ‘60s cotton wedd