Unfortunate there wont be time for any stray trips..i had to change way to travel..since with my ears i dont feel 17 hours on a train is the best...so i changed to get to Harrisburg by plane and from there get to Gettysburg by bus ( wich i would have to been doing anyway)Lancaster Pennsylvania is awesome. Any chance you'll be through there?
You have to watch for the horse drawn buggies if you're close.