I work at a ski area, and thankfully we don't have any "snow guarantees". In my opinion, that is just plain stupid. We can't control the weather, so in turn we have limited control of the snow conditions.
Yesterday was a perfect example. After three or four days of 50+ degree days and 20 degree nights, the snow was HARD. The places that were groomed turned into 6 inches of ground up ice pellets, and the ungroomed terrain would have been better on ice skates. There was nothing that could be done to fix the conditions yesterday. Last night they started making snow to get a fresh layer on everything.
In my opinion, this is the best thing about having a season pass. If the conditions suck, you can go home without feeling like you've been cheated out of a $30+ lift ticket.
Hey it could be worse, you could have a season pass to an area in the Pacific Northwest and not be riding at all.