hey dude i've driven from port huron (sarnia) to stowe and mt. snow which are a little further south of killington. i still think you'd want to drive thru NY tho because there aren't really any good highways in northern NY. hopefully you have awd or 4X4 cuz a lot of VT's state highways are really mountainous and they're pretty rough when its snowin.
Oh yea I'm not worried, got my baby with me! haha 03 f150 fx4 so not worried about traction or anything!
the route iw as going to take was just I 90..... my girlfriends family when they went down a couple years ago went what appears to be outta the way taking I88 and then coming back up....but I90 is pretty much a straight shot.