That's why we leave in the evening. To get below the DC Beltway. I'd love to leave Thursday evening, but alas, work schedules versus amount of vacation time.... <sigh>, so we are leaving Friday Evening. We are not going to go the 95 route though. We will take I81 down to 76 and then swing over to 95 further down. It's slightly longer mileage wise, but time wise it's about the same and without the beltway headaches.
We've only done this trip (DRIVING to Disney) twice, and this will be the third. Sadly, I am stuck doing all the driving. It is what it is though. We drive that first evening until I get tired and pull over at a rest stop/truck stop/wal mart or whatever. Sleep for about 6 to 8 hours, then get up and get some eats and get moving again. Next day is a full day of driving and usually gets us just outside of the Fort. (I could make it but again, don't want to check in at 10 PM or so at night). Another Rest stop for a couple of hours, and then a short jaunt into the fort.
So I get another chance in November to "Test" the route again. We will be there for Thanksgiving (leaving the Wednesday before and basically the same trek).
Me I can be an early bird, a late bird, or a whenever bird, I just need some rest at some point along the way.