Kellogg's Cards at the National Card Convention in Chicago?

I will be attending the show tomorrow.  I'm looking for odd Kellogg's items related to the card sets.  Maybe sheets, advertising items, etc.  I won't be in the market for expensive items, but I will take photos if allowed and post them here.

A few of the auction houses have some Kellogg's sheets and proof cards and I hope they display them at the show.  We'll see.

Here is one sheet I bought recently, but it's not a proof sheet.

Getting all sheets would be a dream goal.  Based on prices realized I think that will always remain a dream.  I have two sheets which sounds like a nice start, but some years there were four different sheets for a given set.