The parking lot is of decent size. Not huge. The Featured section last year was sectioned off in the corner maybe 30 spots big. So I'm assuming it would be the same way this year, unless they use the whole lot.
Anyways, I would just try to get there somewhat early and park together in the lot.
Also, Here are some better pics of the last event.
http://boostjunky.com/gallery/album01