I am on the phone now to a highway worker friend. There, just got off.
Stay off rte 70 unless you want to pay tolls across near half the state.
Rte 80 is free, heavily traveled but in good shape.
Not only that but taking 70 would add about 2 1/2 hours to your trip besides tolls.
Once you get to Ohio then see about another road like 70.
What I remembered from long ago was taking 70 to 68 and the run west from there which is scenic and nice but that's through Maryland which hours and hours out of your way. But then I was going from Delaware west (one time nonstop to the Dayton Fest, woohoo!) and that road happened to be in the right place once I got around Baltimore.