From Strasburg area Tline seems pretty much 2hrs max from what I recall on 55W. But its just a great scenic drive too imo. Some of it is 65mph on the corridor-H section thats complete, the rest is 55mph with lots of passing areas with a few slow downs through the small towns you go thru. Petersburg is a good place to grab a bite to eat or make a pitstop before you get to Tline.
without a doubt your best conditions are gonna be anything on the allegany front from Tline and north. (ie: Tline, Canaan, Wisp, 7S, Blueknob, etc) .. 150-160" average annual snowfall may be small by the standards of utah or colo, but its enormous for a mid-atl resort. Oh yeah, and Tline is having their "Snowy Luau" next weekend, so you gotta go!