Just a thought for those in Florida, the Amtrac Auto Train charges $325 return from Sanford ( Orlando ) to Lorton ( DC ). I checked the dates and everything, it all seems to check out. Work out how much your diesel will be plus tolls and coffee to keep you driving and the conveniance of not having to drive 17 hours, its got to be worth it. No stops on the train by the way, and I worked on the premise of 4 adults to a car. Something to think about.