I am not going to torture myself to go back and look at that movie, but would like to comment on the picture you posted. I am not completely sure but it looks more like an older "chassis mount" rig. Yes, before the US Congress came up with "Class A, Class B, etc", we had "trailers" and "pickup campers" and the "chassis mounts" came along after the slide ins, from my hazy memory. Yes, I assume, today it would be branded as a "vintage Class C". My folks had two chassis mounts after having two slide in pick up campers. Their first one was a "Dreamer" the second was a "Red Dale". Then they got into the Class C's, a descriptive that came about in the nick of time. They started with a Tioga, then a Dutchman. Now, back to the discussion of the merits of Nomadland.