They have the following at the head of the caravan page:
At each public visit, the participants will sign free autographs, meet with members of the media and discuss the 2010 Braves season. In addition, fans will have the opportunity to purchase tickets for the 2010 season, including mini-plans that will feature Opening Day.
This is why I'd assume there is a signing session at Franklin, TN but the email info doesn't mention it. If I'm driving three hours for this I want to KNOW that there is a signing session.
Hopefully all of the details will be cleared up soon.