We went on Thursday this year, and we left early. Vicki lives in Deltona just off of I-4, so it's only about a 10 or 15 minute drive. We drove straight in, no traffic, and parked where we didn't have to walk a mile to the car when we left. Last year and the year before we went on Friday or Saturday and even though we thought we left early because she lives so close, we sat in traffic and hour or so trying to get in and get parked- and we had to walk a mile to the car when we left. It seemed like a mile anyway.
The only down side was that we probably missed seeing some cars that didn't get there until Friday or Saturday. But, on the other hand, there's so many cars and so much to see we've never seen everything there was to see in a day anyway.