Last December we purchased seasonl passes and are going back in three weeks. However, the summer is blacked out for the seasonal passes. We called to get a price on how much it will be to upgrade the passes to annual passes and were told they can't give us a price on the phone only at the gate....I was just curious to see if anyone else has done this and how much it cost. They told me they prorate the amount?? Please any information would be great!