Yes, CAD doesn't hold on as long on the ridges/mountains vs valley areas - places like Cumberland west to Frostburg are better spots for icing. Similarly, I've seen plenty of setups where Garrett holds onto all snow longer than higher elevations in WV (Canaan) that flip earlier to sleet once the mid levels warm. In our 6 years of having our house out there, I've been there for a few 0.25"+ ice accretions but wasn't high impact in terms of power disruptions, etc. The one that does come to mind was maybe 2 (or 3) years ago where Deep Creek got over 0.5" of ice accretion and had power outages and we lost two trees on our property. I'm terrible at remembering dates/exacts of events and we weren't there for it, but that was one of the more memorable ones that I can recall.
^^That's a good first call for ice out there IMO