Ok, from Fairfield to your uncle's you're talking less than 15 miles, probably around 25-30 minutes because of traffic, a bit of construction, and unfamiliarity with the route. He lives in a beautiful neighborhood!
As for activities, I dug up that list of suggestions I mentioned and will include it here. You may also want to consider a day trip down to Lynchburg and eating at Miss Mary Bobo's Boarding House. They draw visitors from around the world for their true southern cooking and genteel hospitality.
Other day trip options include Mammoth Cave Park in Kentucky, Huntsville Space and Rocket Center, Shiloh Battlefield, Chattanooga...Rock City, Lookout Mountain, the Aquarium, Ruby Falls, etc.
http://www.tugbbs.com/forums/showthread.php?t=39852...
It (the Opryland Hotel, next door to the Fairfield) is simply HUGE! But it is beautiful. In fact, it is a destination itself. While in Nashville, consider a ride on one of the river boats, either the Belle Carol or the General Jackson...the General if it will fit your schedule. June should be great weather for such an excursion.
A visit to the Parthenon (Centennial Park) is very cool. The 42' tall gold plated statue of
Athena is worth seeing, especially if you are able to arrange a tour guide who can fill you in on all the tidbits surrounding her.
... "a couple" of days in Nashville just won't be enough. There is simply too much to consider. For example...
Do you want to do history? The Hermitage, The Battle of Franklin, The Timeline at Bicentennial Park, Belle Meade, Fort Nashboro, the Civil Rights Room at the Downtown Library...
Do you want to do Country music? The Grand Ole Opry, Ryman Auditorium, Country Music Hall of Fame, Stars' Homes Tours...
Outdoor/Sports activities? Nashville Shores Water Park, Shelby Bottoms Greenway (bicycle path), golf courses, Two Rivers Skateboard Park, Wave Country, minigolf...
Cultural? Frist Arts Center, Schermerhorn Symphony Center, Cheekwood Gallery and Gardens, Tennessee Performing Arts Center, Concerts in the Park...
Touristy? Gibson Guitar at OpryMills Mall, The Cowboy Church, 2nd Avenue, Printer's Alley...
Professional Sports? The Nashville Sounds (we also have the Predators the Titans, and the Kats but I don't know that those teams offer anything while you'll be here)
Leisure time?fishing, boating on the lakes, driving the Natchez Trace, walking in the parks, taking the walking tour around town...
The list goes on...this only scratches the surface and I didn't even mention the special events held throughout the summer.
Restaurants...A Southern Favorite is Cracker Barrel. You can have breakfast there all day as well as other "good eats". Beef Stew and Biscuits, Pork Chops and Fried Apples, Catfish and Hushpuppies or Country Ham w/ Red Eye Gravy. YUM!!!
Monell's is a local favorite as well. (Ask Shaggy about Monell's...she LOVED it!) Despite their name, they serve great Southern cooking, family style so even if you come in alone, you'll leave with new friends. It's a one-price place so come HUNGRY!!!