Makes you wonder . . . Mom says something about 'it must be tiring riding with our things in the moving truck.' This means that Mom got to Littleroot a different way, most likely in a car, though none are seen. Even if she walked, don't you think Brendan/May could have gone with her?
Then again, maybe she was just getting cosy with the truck driver in the front seat. idk. Hell, maybe she was the truck driver?