Pulled one up US 31 in west MI without any issues even took the time to swing through Sam's club on the way home was more at eaze than on some of the 2 lane roads.  Dealer has pulled augers through Grand Rapids MI on several ocassions he didn't seem phased.  Does the signs say no farm equipment or no self propelled farm equipment?  Chance are IF you got pulled over the most they would do is ask you to take a different route.