A few thoughts.
I'm studying to become a Catholic deacon up here in New York. The church can, and often does, grant exceptions to permit the sacrament of marriage to be performed outside of a Catholic church.
It's rare, though, and must come directly from the bishop.
And the bishop in Orlando is not very Disney-friendly. In 1996, for our first trip to WDW, for our 10th wedding anniversary, my wife and I wanted to renew our wedding vows on Disney property. No mass or anything. Just a brief prayer service.
We were told by officials at the diocese that they would not provide a priest for such a function. It was the feeling of the bishop, they told us, that Disney is too frivolous a place for something as serious as the sacrament of marriage. They would not allow any weddings (not even renewal of vows!!) to be performed on property. We were stunned.
A Disney wedding planner put us in touch with a very nice Presbyterian minister, though, who did a brief ceremony in the Yacht Club gazebo -- just me, my wife, the minister, our "wedding" planner and a bottle of champagne -- and it was lovely.