wow, the place is so beautiful, I don't think that it needs a lot of decorations. But I would definitely think that paper lanterns are the way to go. Or check this out:http://www.marthastewart.com/page.jhtml?type=content&id=channel188043&catid=cat336
I have never actually made them, but I would think that you could string them on a strand of Christmas lights. and that would be fancier than just plain paper lanterns. And you could get the place to fold the napkins in a cool way, or just accordion fold them and stick them in the wine glasses. But I would stick with sparse decorations since the place is so huge, it would be hard to do everything.