Yeah there's not much you can do, if I try and work on my diagonal line so that when I get promoted and get assistants then it will be easy to adapt. I do all junior games and don't often get any grief from the parents/coaches especially those who have had to ref before. If you don't give the offside and someone questions you just point to the rear most defender and say "he played him on" the blame then usually shifts from you to the defended, even if it wasn't him.
Just say to the coaches before that match that you will try your best with offsides but you are a 1 man team, they usually understand but will still appeal, which I can live with