Don't leave anything of value in your car overnight. In fact, don't leave anything in your car at all.
Pittsburgh is pretty safe, but dang the punk theives love to break windows and steal anything and everything from your car at night.
Enjoy the great food... pierogies, Turners iced tea, Primanti sandwiches, Gobs...also known as Whoopi pies.
Have fun. I hope Yinz have a great time.
Yinz = you
Pittsburgers have a language all of their own.