Carol, Wrenwood Inn from Paw Paw, WV on 10/9/2014 9:13:15 PM:
It has been unseasonably cool lately (most all of Sept). Here in October it has been 70s during the day, 50s at night. By the time you arrive Oct. 21 the peak color in Pennsylvania will probably be a little past prime (but still pretty), however WV and MD should be just fine. If you wish, ask again a couple of days before you leave and I'll give you an update.