If you're going to Squaw anyway, it couldn't hurt to try. Bring it with you the next morning and whine and plead and beg. Otherwise, fork over the cash. SV has the most expensive lift tix in Tahoe. Now is the time to look for deals. I never, ever pay full price for a lift ticket, but I recall last time we were there the best deal we could find was still $64. But it's better than $80.
How do you, "not pay full price?"