Garages don't mind. What if you had a large repair to do at the time it was due for inspection and you couldn't afford it (the situation I'm in, mine has been temporarily retired to the driveway for now. Was due in May).

Audio tour if you're not getting the private tour. Just know that the private tour hosts are very knowledgeable. Devil's Den, you can see Little Round Top from there from a distance just rehabbing going on there. Pennsylvania monument, Sach's bridge, cannonball in the brick in the church (304 Baltimore Street), Lincoln Address Memorial in Soldier's National Cemetery.

My suggestion would be somewhere near a train station. Driving to Philly during the morning rush hour can be horrendous, I imagine NY would be the same. Construction has been ongoing on 95 for years near Philly.