First off, congratulations.
Before you leave, I would recommend upgrading your WDW passes to the premier passes (if possible, see below). These passes are good at bot WDW and DL. They are treated the same as the highest level of passes at both resorts, providing ALL discounts, parking and admission benefits.
I would check with Disney as to if your passes will have any value to upgrade towards the Premier. I know at
Disneyland, they would have the same values as if you paid cash for that level of pass.
If they allow you to do so, the cost would be $749 - the value of your pass originally as of tomorrow.
Again, i would simply ask Disney, since you are getting married at WDW, even if there is officially no value, they may be able to work in an upgrade to the premier pass into you wedding cost for a minimal amount. I figure, you should always ask, the worst they are going to say is no.