I also think it's possible, however, he was heard leaving the farm in his car by the Foukes so how would that tie in with him staying the night? Even if he took his car home and then brought in the last trailer how would he explain where his car was, or maybe he took a chance no one would notice?
Jeremy 'could' have forced an argument over bringing back the last trailer, he could have stormed out (remember Nevill was in a bad mood when BW called - as though he'd had an argument). We know he told Len Foakes that Nevill would be sorting out the final load just before driving off (Doris Foakes hears his car leave). He could have dropped off his car, called Julie before making his way back to WHF. Whether he brought the last trailer back or Nevill did, he could have come back saying he felt guilty and wanted to help. It being late - he decides to stay the night.