How about from Wakefield MA (12 miles north of Boston). Last February, left the Saturday after Presidents day. Cast - DH, DS (5), Dog - Bonnie aged 11 LOL. Rolled down my driveway 4 AM, we were the only car heading west on the Mass Pike. Went through NYC by 8 AM. Very little traffic through Washington. Stopped in Rocky Mount NC around 6 pm. We averaged stopping every 2 hours for at least 15 minutes or longer if we were eating. We had a great experience. Had some great family time, chatting, listened to Harry Potter Books on Tape, I had wrapped up little gifts for DS that we gave to him each state we entered, at the time Matchbox had cars with state license plates. We didn't hit any bad weather. We left Rocky Mount at I think 5 AM, and arrived at Disney about 2 pm. We would drive again.
Another thing, My Parents drive to Marco Island FL every year, last week of February - they have never had to stop for weather, and they must be going for at least 10 years now. But they stop the first night in Fredricksburg Va, and then they stop in Myrtle Beach and stay a few days.