We left at 4am and drove straight through! The kids slept alot and we made it to WDW at 9pm. We stopped for gas, food, potty and to just stretch. We have a tv/dvd and DD watched a couple of movies. She really didn't use any of the stuff I packed in her goody bag, like coloring books and stuff.
We have done the drive 6 other times and this way worked for us the best. We had no plans for a hotel on the way down, just played it by ear. We ended up staying at ASSMo for $86 for the night.