I have the same vouchers...they are good at most, but not all of the major resorts...I am in the alps this year so I won't be able to use them but haven't decided if I will sent them back home to some friends or try to unload them. PM me if interested.
Walk-up Vail is now $92 day or at least in March when we're planning on going. The 3-days(Vail/BC) of 5 Summit resorts is around 275 online so the Schwab vouchers(they do these every yr) are good deal. Just exchange at tkt window-no questions asked.