Brian,

Excellent reason for a first post on Ag Talk.  Congratulations.  If I were going to Nashville and really wanted to impress someone the only choice is Gaylord's Opryland Resort ( see http://www.gaylordhotels.com/gaylord-opryland/index.html ).  Fantastic place.   One quick quote from their web page:

You'll be amazed at the hotel's nine acres of indoor gardens, cascading waterfalls and an indoor river with its own Delta flatboat. Within this lush landscape, you'll discover fine dining and casual restaurants, unique shopping experiences, and a 20,000-square-foot resort spa and fitness center. And for late-night excitement, check out our latest entertainment adventure, Fuse Nightclub.

Yes, 9 acres under roof.  It's worth stopping just to wonder around the gardens.  There is a "Romantic Memories" package.  Kind of pricey, but then again you hope to only get married once.