RE: State snack?
I live on the Hoosier side of the River within sight of Louisville.
Popcorn is THE SNACK for the Hoosiers, as pointed out in the original post at the top of the list...but not said in jest. Folks here grow A LOT of popcorn and ship it by the trainload out of the area.
For Kentucky, Bourbon Balls are a regional speciality...but I don't think they are consumed in large quantities....tooooo expensive!!
I am not aware of an Official Snack for the KY Folks.