We have a trip planned Dec. 6-14th and of course our dates are blacked out for free dining. We are thinking of changing it to Nov. 15-23 which would save us $1800. Problem being we already bought MVMCP tickets...can we exchange them? Also, we have all of our ressies made and would have to take the risk of not getting what we want if we switch. I'm wondering if it will be not as busy without free dining avail. during the dec. week because people will want to go the free dining weeks. Help!