I don't know the travel time from Va Beach to Ft Lauderdale, but Raleigh to Orlando was 9 hrs last year, and that included stopping for lunch (45+ min) and 2 or 3 pit stops. Wynn typically drives between 5-10 over speed limit, depending on the traffic, and we didn't run into any heavy traffic situations. I would guess add 2-2.5 hrs for your drive.
We like to go down all 1 day, and have the drive over with. We are planning to leave around 7AM, so we will probably actually leave between 8-9!

Our ADR at Margarittaville is for 7:30 Sat night. Coming home, we take 2 days... leave MK at close and drive to Jacksonville. On Sunday, we will go the rest of the way home, but will stop in Savannah for 4-5 hrs to visit Wynn's brother and family... makes a great stop for the kids to run and play with cousins, and eat a good dinner. We will get home around 8-9 PM on Sunday.