You may want to look into the Auto Train. It goes from Lorton VA (just south of DC) to Sanford FL (just north of Orlando.) They let you take your car on the train. It is an over night trip so you sleep on the train. You can pay extra for a sleeper car, but we just slept in the coach seats when we went. It is really nice to have your car in Disney. It saves you from having to get a rental car or shuttle. It was a really fun and relaxing way to get to Disney.