Hosman321 , I'd say : wear comfy shoes !
Be prepared for waiting in lines , esp for appraisal areas .
Many 'higher-end' items , in my experience , are priced @ retail level and above (by the 'major' exhibitors) .
Chances are pretty fair that you'll see some wonderful/unusual and unique antiques !
If you're looking for something specific , it pays to take the exhibitor 'aside' and ask if they've got such an item (also ask if they've got more 'things' in their trailers , etc -if you're really serious about buying , that is) .
They've usually chatted with other exhibitors/dealers at the show & might know another who has got what you're looking for .
One of my favorite tactics is to 'dress down' a little & wear NO BLING , esp if there's an auction involved .
Sneaky old-man tricks .