Back when I lived in Vermont and made the family trip to WDW we always drove the 1540 miles. I always allowed extra time for that because I cannot enjoy anything if I am over tired. I know a lot of folks that made the trip non-stop, I would be a pile of useless flesh if I did that. Yes, I could do it, but whatever time I saved would be wasted just trying to recharge my batteries. When we first started doing it, we would leave home on Friday night and drive from Vermont to Albany, NY. To me that was always the worst part of the trip because usually I had worked almost all day, run around like a chicken with its head cut off, but, I wanted to get the 150 miles out of the way. We would stay overnight had head on south in the morning. Back then we went down through New Jersey and Maryland and DC then continue on I-95 to Richmond, VA, next day to the bottom of So. Carolina, then on to Kissimmee arriving on Monday at noon or so. After one trip like that we shortened it up by Just leaving home on Saturday and going through to Fredericksburg, VA, next day to the So. Carolina Border and then on to Kissimmee arriving around 3pm or so. Rest up and hit the parks on next morning. I know to many that seems like a waste of time, but, for me the journey was as much fun as the destination. I would get to the parks on Tuesday morning full of energy and just have a great time. I hated the return trip, however, that one seemed to go on forever, but, we actually took the same amount of time. We also avoided all the tolls in NJ and Maryland, by cutting across to Pennsylvania and then back down through Maryland, W. Virginia and Virginia then cutting over and stopping again in Fredericksburg, VA. It was just the way that we enjoyed the trip. Odd I know, but, different strokes for different folks.
Now that I am older and my love for road trips still remains, but, at a more sane level, I leave Raleigh at 6am and arrive in Kissimmee at 4pm. Much better and way cheaper then flying. That way I easily can stay offsite and avoid any car rentals. However, the times that I elected to fly down, I found that the car rentals costs in Florida were so reasonable that I still had a car, stayed offsite and save a boatload of money. Even the one time I stayed onsite at POP, I had a rental car and out of a seven day trip I spent 3 of those days exploring other parts of central Florida. I wouldn't change a thing about my travel habits.