I don't know where you are starting from on I-84, but consider:
US-209S (Deleware Water Gap) to
US-30W into the York area.
We have taken the route before towing a Montana 3400 RL with an F350 King Ranch. One short detour on the Delaware Water Gap is a narrow part, but was doable. We have also taken those US highways and the DWG in the 40 foot DP w/TOAD.
p.s., if you Google map search and put in directions from Milford, PA to York, it actually gives the route I suggested.
Wayne MSGT USMC (Ret) & Earlene (CinCHouse)
2008 Winnebago Destination 39W
It is what it is, and then it is what you make of it.