This is posted on their event page:

Since we started the Chattanooga Cruise-In a few years ago, the fall event has always been the smaller of the two. While the spring event is huge and maximum capacity all day long, the fall event is so much more relaxed and laid back (especially for all of us!) It's pretty much the in-house favorite of the two. We expect the same great early fall atmosphere this time around. Please note: while the crowds may be a little bit smaller, we don't have the grass field this time around and should see about the same levels of limited parking. We've reserved 100 spots at the football stadium across Main Street as overflow parking. If you're bringing a car club or group, please lets us know, so we can work with you.

I don't know how many people are planning to go, but it sounds like parking space will be reduced since they won't have the grass field open this time. Plan to get there early if possible, it now starts at 10 AM.

I think it was a good turnout! You had to get there super early in order to get in. By the time I got there around 10:45, the guy working the gate told me they were pretty much full but had a spot right there at the entrance so I took it. Met up with Nick and Matthew shortly after and toured the block. Also met up with Chuck and Andrea, Travis Young, even Chris Barnes. We put Swap-a-Paluza flyers in or on every VW we came across, which was quite a few. Everyone we talked to about it said they were planning to come.