That was a close call. I'm glad that you swerved the bale of hay and you and your son are ok. Where I moved to, Mc Henry, there are people that haul hay in tall opened trailers, but they go very slow. Like 20-30mph on 45 or even 55mph roads. Other drivers try to pass them while I enjoy ride at a slower speed. There are farmers too that drive tractors on the roads but I haven't got stuck behind them yet in my moped yet(once in my truck). I wish there could be slower roads out there for mopeds. Kind of like a bike line, or even share bike lanes but you would have to obey a certain speed limit. If roads like those could be built all over the US...there would be no limit where you could ride and it would be much safer than being on the regular roads w/ these idiots. I have to take a road to and from work that goes up to 55mph each day(drops down very shortly though to 45mph then 35mph). Drive safe and always be alert.
BTW were you and your son both wearing helmets?