We love going during that time. We will typically depart the house (here in NE PA) on "Tuesday" night before Thanksgiving after work/school, drive for about 4-5 hours. We then pull over in Southern Virginia somewhere, sleep for the night, get up (clean up, eat breakfast, etc...) and get rolling on down the road for a full day of driving. Then we pull over about an hour or so outside of the Fort that night. Sleep, get up again, and pull into the fort on Thanksgiving day.
We will stay for the rest of that week and then leave either Friday night of the next week or that following Saturday morning.
We love that time because of the decorations at the Fort and Disney, but also it marries well with the school and work schedule. Our school district does a "Half Day" before Thanksgiving, and they don't go back until the following Tuesday. That means she will only miss 4.5 days and really that half day she isn't missing anything. One year they also had some snow cancellations to the point that she only missed 3 days. For DW and I, we end up with 12 days off of work with only 6 or 7 days of work (DW gets black Friday and I usually get a "Floating" holiday.)
I hope you get your days you want and have a great trip.