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C-dub wrote:I-79 goes right up into PA without entering MD. And so does I-70 from a little more eastward.

I try to avoid I-79 in WV or SW Pa if I'm in a hurry.
I generally use I-30 to Little Rock, I-40 to Nashville, I-65 to Louisville, I-71 to either Columbus or up near Akron, I-70 from Columbus to Pa. or I-76 through Akron to I-80. If Illinois becomes more gun friendly I may use the St Louis/ Indianapolis way again.

Once the Tx/ Ohio recognition takes effect next Spring you will be able to go to Pa a couple different ways avoiding Md. Going up through Cincinnati even avoids Il. Anything beyond Pa. is a problem though.