Flight
The best airport to fly into would be in Nashville. The Knoxville airport is about 25 minutes of a further drive (If you're flying in on Saturday, Knoxville is in the eastern time zone compared to Sparta in the central time zone). There is a small airport near Sparta for private planes.
Travel Note
Although my parents would love to be able to host all of you, their home and rentals will be full that week. The best place to look for a stay locally, is airbnb. Hotels will be in Cookeville.