I have just booked two weeks (in two separate 7 night bookings) under the 4/3 deal for April. Therefore we get a l day park ticket for the first week and one for the second week. I only did this to get the package as we only purchased annual passes in January. Can I exchange this ticket for a water park ticket instead? Wouldn't want the difference in price back but otherwise can't think when would use the 1 day tickets!