Speaking of crossing barriers, have you heard Moira Smiley? You may have come across her work in the context of Celtic, Balkan, Appalachian, and several other sorts of music. She’s a gifted singer and composer who will be making her festival debut headlining a concert as well as appearing with Jayme Stone’s Folklife, a group whose repertoire could be seen as a mini festival of American roots music on its own.