HI Bea,
We left early on a Friday from Ottawa too. For the first time, we bypassed the Baltimore/Washington area staying on I81, all the way through Pennsylvania, part of West Virginia and then into Virginia itself. We cut over to 95 at I66. We then used a combination of US17 and US15 to hook up with I95 about an hour north of Richmond.
Even with two kids under 8, we made pretty good time. We left at 8 a.m. and arrived in Chester, VA (a little south of Richmond) at 7.35 p.m. 17 and 15 weren't as fast as I'd hoped, but we did avoid all the Balt/Wash. traffic and it was far less stressful.