You are unlikely to find a place beside a desert road where you can bury a body and a barrel to burn the other evidence, especially one that wouldn’t draw attention. Digging a grave in a floor less tent and not leaving a grave-sized mound would be wiser. “I’ll show myself out.” isn’t a normal statement in a middle class home. I find it less conspicuous to only kill one person annually, and, after the humans are dismembered, pigs are probably the best way to dispose of bodies. Otherwise, outstanding suspense.