Hi Sandra! I promised I would post about driving after our WDW/Cruise trip from December 27th - January 12th. We had fantastic driving weather on our two days down and two days back. The trip down is certainly a little easier, and Dave Hunter's book "Along I75" even shows you things like where to see the first palm tree in Georgia. The children had a TV, which did help to pass the time for them, and they also did some homework and reading in the car. We didn't stop for very long during the day - just gas, food, bathrooms, and a very quick stretch of the legs. The first day of each trip we pushed a little harder, driving from about 6:45 to 10:45 on the way down, so that we could have an easier second day, arriving at WDW around 6:00 p.m. We used the same approach on the way back, too.
Dave Hunter suggested the Jameson Inn chain of hotels, and we stayed overnight at 2 different ones. With tax the room was about $65 per night for the four of us, and they have a basic continental breakfast to speed you on your way in the morning.
Normally it's cheaper for us to fly, since DH is self employed and has to take the extra time off. However, since this was a 2 week vacation and the drive could mostly be done on the weekends, we decided to give it a try. Driving on the weekends also means that you avoid most of the bottlenecks on the I75 around Cincinnati, Atlanta, etc.
Cheers,