Thanks for sharing!! To dive into this a bit more deeply, was hoping to make it to Santee SC on day one (again, departing from upstate NY) with a much shorter drive day 2. Also debating how long to stay on I81. The
AAA Trip Tik (oh yes, I did get one and had it mailed to me for the true "seasoned driver" feeling along with actual paper maps) suggests joining 95 just south of DC, but I'm seeing other routes suggesting to remain on I81 until Roanoke and then heading south from there on I73 and I74 until joining up with I95 in Florence.