AWESOME! We go to Gettysburg every summer during 4th of July (when the battle took place) and I'm bringing Jackson this year. I saw sooo many dogs in Gettysburg and it made me miss Jackson so he will be coming along next time.
There's a lot of outdoor restaurants there (an Irish pub called O'Rourkes across from one of the newer bigger hotels, I think Marriott, maybe??) and they're allowed when you visit all the battlefields and stuff (where Devils Den is).
I live in Maryland, so if ya come near the Annapolis area, give me a holler!
Quiet Waters Park is like the #2 dog park in the US or something and it's a nice place. I take Jackson there all the time in the warmer weather if you want something for little Sophie to enjoy.