The KDW is a SUMMER tire and doesn't fare well in ice or snow at all!! If you can't put a different tire/wheel set-up on your car...I'd consider renting/borrowing another to make the trip.
Below is the standard set-up used by most Contour owners who have to endure extreme winter conditions (except those of us who live in the southern portion of the U.S.

)
http://www.tirerack.com/snow/SnowSelectWheelSize.jsp?autoMake=Ford&autoModel=Contour+SVT&autoYear=2000
or, found this in the classifieds (scroll down to Blizzak ad):
http://www.contour.org/classifieds/classifieds.php?t=1&c=3
Regards, Art