I live right next to Nashville, there are plenty of hotels nearby especially if you are driving. You are fairly close to the airport so you know how hotels are around them. I would suggest getting a room sooner rather than later. Nashville has become very trendy lately and is always packed.
Places to see if you have never been are the Grand Ole Opry, 2nd Ave and Broadway are where all the bars and restaurants are. Best breakfast in Nashville is the Loveless Cafe they have great biscuits and ham. Caney fork river valley Grille is a good place for lunch and dinner and sell elk, alligator, frog legs, venison, steak etc. You have the Parthenon on the west side of Nashville which is an exact replica of the Parthenon in Greece.
If there is something specific you are looking for just ask and I will try to guide you in the right direction.