We drive from the Philly area to WDW atleast once/year and its not a bad ride if you time it right, especially around Washington DC area! We leave around 6pm at night and drive right through the night, only stopping for gas and bathroom breaks, we switch drivers half way down so my husband can sleep for a few hours. We usually arrive in Disney by 1030am, and are ready to start our day! We have kids to and they sleep overnight in the car and are entertained with the DVD player, games and snacks in the car during the ride! Like I said its not a bad right if you time it right!!!
Feel free to inbox me with any specific questions ...