UPDATE - The 757 recently arrived in Enola, PA, which is near Harrisburg. Norfolk Southern recently posted a video on Facebook, Instagram etc. of the engine turning on the Enola turntable: the first time the table had seen a steam locomotive (dead or alive) in 62 years!
Folks have speculated she'll round the Horseshoe Curve, so keep your eyes peeled on the webcam in the coming days!