I can make it from NJ (near the Meadowlands) to my condo at Sugarbush in just under 5 hours if there's no traffic and good weather. I agree the extra 45 minutes or so to Stowe makes a big difference though. And coming from NJ it always took me a good 40-45 minutes longer to Stowe as well no matter what I tried.
Hm - yeah, so I'm about 30-40 minutes south of you, so sounds like it will be 5.5.
Just put in a VRBO request for a nice looking place...we'll see if we get it.