In your case maybe you wouldn't want advertise your Chapter show but quite a few of the Chapters have their shows at existing tractor show grounds and a few words about it on this forum could boost attendance at the show. Quite a few of the shows I go to are attended by people passing through on vacation and unless you subscribe to the "Farm Collector's Magazine show directory" you might have a tough time finding where the Oliver guys in Whoville are having there show this year.
Here is a link to the FCM Directory. 

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Steve Peterson