When the two girls drive up to Joe and Gus as they are pushing their boat with trailer on the highway, the girls' El Camino has no trailer hitch. A short time later, they are towing the boat on its trailer.
One of the final scenes shows a "media frenzy." A lens enters from the left of frame, but instead of being a prop TV camera, it's a Panavision Primo lens from a 35mm film camera used to shoot the movie.