We did have some days where we had to do long miles to get a place to stay, and push til just about dark. Can't honestly remember exactly much, it was 3 years ago. But I think we could have gone short instead of long. There were definitely some big spaces between lodgings.

This was in early October, with short days.

Here's what's in my journal:
Pittsburgh
to West Newton (56mi/3180feet)
to Ohiopyle (43/620) rail trail (the best part of the route), stayed at a friend of a friend's house (by car)
to Bedford (76/3300) had to push to make it to a hotel
to Chambersburg (74/5280) hard hills, push to make it to a hotel
to Gettysburg (23/880) lots of hotels
to New Holland (70/2460) no notes, can't remember
to Lambertsville NJ (80/3760) lots of hotel options, long day

Hope this helps.