Well, without an actual count, I'd say that the traffic from Daytona to Orlando on I-4 is a pretty good indication of the number of cars used for vacation. A number of reasons, first it usually ends up being cheaper to drive especially with a family, Second, it enables you to bring anything you want with you, i.e. strollers, luggage, family needs, Third, it easily allows for going to different attractions in the central Florida area and many, like myself, want to see more than one place. I know that a whole lot of people fly in and a whole lot of people actually like to just stay with that one enjoyment and nothing else, however, I would not be one of those. I love me some road trip.