As a lurker from Pittsburgh who enjoys Deep Creek (was there this past week and there were a couple sunny days that stayed in the 60s), the temperature difference is truly incredible. Agree that most of the snow is upslope, though as others have said, they do cash in much better than the cities do when bigger synoptic storms come through.
Another note: to some extent, we Pittsburghers do resent Mid-Atlantic folk buying up property in that area - back in the ‘90s that was our vacation destination before DC folk and the like discovered it and drove the prices through the roof. But that’s water under the bridge at this point, along with the NWS reassigning Garrett County from PBZ to LWX.