If you go the last day, remind them of meeting you on the first day. Clubs get a free table. As a Club Rep, you get a photo-ID and a ribbon. As an ANA Member you get a ribbon. Committee chairs get ribbons.
Speakers get ribbons.
Exhibitors and Judges get photo-ID and ribbons. When you deal with a chestful of ribbons, you deal from a position of respect. I can't say more because some of the items were unique. All of these will be for sale at local shows and while they are, they are mine to enjoy, to identify, and to attribute. If you are not into ancients, consider the bargains on six-step nickels, key date Wheaties, and national banknotes.