WAS THIS A DINOSAUR?

The incident I am about to describe allegedly took place in South Dakota in the year 1934.  This saurian is said to have seen a tractor.  Possibly he thought it was a rival dinosaur.  This tractor was driven by a farmer and was near Lake Campbell.  The dinosaur attacked the vehicle, forcing it off the road.  Tracks were later found leading through the nearby mud to the lake.  Moreover, similar tracks have been found since.  Additionally, animals have gone missing in the area.  Does some primeval beast inhabit the lake?