I normally take I 95 North to South Carolina, where I pick ip I26 west to I77 North, than I81 to PA where I pick up I84 east. This way I avoid serveral cities.. I81 does have a bit of truck traffic.
This route will add about 75 miles miles on to your trip, but there's less overall traffic.
George & Laraine
and The Golden Ones, Montana & Sierra
2013 Expedition 38s, 2014 Jeep Wrangler Unlimited