Not that we know of, but they only took the 7-8pm time and I believe they were only looking for the Trooper. We have no way of knowing if any other vehicles went by before 7pm.
Hindsight 20/20, Monday Quarterback etc: You would think that DuGal would have wanted video, even days before/after they went missing, to look at. Anything that might point you in a direction to find the family, at that time. Any suspicious people/vehicles etc that *might* have been captured on the camera.
He must have only wanted the day they went missing?