Up the mountain one last time with Sweetgrass
Though the breathtaking vistas of Big Sky Country in Sweetgrass, Ilisa Barbash and Lucien Castaing-Taylor’s unforgettable sheep-herding documentary, come close to heaven, it’s telling that AC/DC’s “Highway to Hell” can be faintly heard over the sound of the electronic contraptions that hired hands yield to shear the docile creatures, one…