While I completely expect she'd want an Ajaccio wedding, I could also see a destination wedding in a place like Quinta do lorde resort. First of all, the press would think she is there for the dance instruction sessions. They could wait until the DALT tourists leave, then have family and some friends show up and have a nice private ceremony without the press or public (us) ever even knowing. A private person's dream come true.
Edit:
Don't worry though.... we'd still see some photos. Someone would post a few, if only to get attention. Might have to wait a couple of years for that.
Edit again...
I see the photo Greg posted today was taken from the little patio behind the chapel
But so were others so maybe its just a good place for a photo.