The way - I think - it worked last year was,
In May, the Kyle Busch Fan Club members could RSVP to the autograph session and be assured an autograph. Basically.. if 500 people show up in May for the signing and 200 are fan club members.. they'll be the only ones who are 100% getting an autograph, while 50 or so of the rest may miss out due to time.
In October, they have the Fan Club meeting which is exclusive for fan club members and won't be open to the public.
I am going to assume this is the way it'll work this year, but I wasn't a member last year to know if that is how it really worked. I read about it in an article where Ryan Kingsbury (was/is Kyle's commication manager) regarding last year.
Honestly, it's worth the $35 bucks for the flag. LOL! That thign is awesome.