From what I’ve read/seen it can vary by area and venue, but the rallies are normally packed and some aren’t able to get in. I was looking up the venue and trying to get more info, but not having much luck with specifics. Looked up the Fairgrounds info and from the little picture, looks like there is a lot of parking all around. Also, 3 gates - not sure if all will be open.
Aerial view of the area:
http://www.floridastatefair.com/p/facilityrental/239
You probably have directions, but if not:
http://www.floridastatefair.com/p/about/240
Have a super time!!