"I will give in to the dark clouds/I will sing with the fog in my throat," begins Samantha Crain on her debut LP. The line seems half-true. Her voice is gorgeously odd — all fulsome, shape-shifting vowels that do indeed billow like fog. But while her moody country rock is full of dark themes, she rarely gives in to them: Her band plays with jaunty sweetness, shuffling and bouncing through...