I know that post said it was just a rumor, but, DON'T DO IT VANDERBILT! I can't believe Vandy would even consider moving their games to a stadium at the Fairgrounds. Even when they had a good team they didn't exactly have a huge student turnout.
An MLS stadium won't be ready for a couple of years so if Vandy was waiting for a temporary home to do renovations, why not just look into Nissan stadium so they could fix things now? Unless they did and the Titans said no, it would seem like Vandy is seeking a more permanent move.
When I was in college at Pitt I went from a stadium on campus to Heinz Field. They really lost a lot of the game-day atmosphere. It was so fun being on campus on game-days. I literally lived across a 2-lane street from the stadium. My dorm had a large plaza area and was between 4 frat houses and down the street from 4 others so there were always grills going, music playing, lots of people around hanging out playing games and getting ready for the game. Basically that's where most of the students/alumni and even the public would tailgate. The band would play on the plaza and in the quad early in the morning and wake up the students in the dorms/houses (wow, I literally just remembered that, I had forgotten all about that!). The Panther walk went past our building and down the street to the locker room.
At Heinz field the Panther walk is in the parking lot. Students take shuttles to games. There is a designated tailgate lot for students, but it's a good hike away from the stadium and under a freaking interstate overpass. It's just not the same as being on campus.
I lived in city that was obsessed with football. Even still, after the newness wore off there was a noticeable drop in the student attendance. They would come late and leave early. It was really bad. It's taken a while and a large effort to get students to finally be there on time and stay the whole game (a good team, coach, players help).
The on-campus stadium game-day atmosphere is special and it's a shame schools want to get rid of it. I just think this would be a big mistake for a school like Vanderbilt.