The bizarre act of Chris “Sandman” Sand—original cowboy ballads interspersed with rapping—doesn’t seem like the best strategy for pop-music stardom, nor does the fact that he still lives in his tiny hometown of Dunn Center, North Dakota, whose elderly residents probably prefer Roy Rogers to LL Cool J. But there’s something charming about Sandman’s oddball quest and the indomitable spirit that shines through his hapless road tour, his hexed day job as a truck driver, and the free concert of sometimes raunchy material that he performs for his polite neighbors. Director-cinematographer Elizabeth Lawrence treats her likable, talented subject with the bemused affection he deserves.