I forgot a key component of my display: the L-brackets that hold the cross bar from which three picture frames would hang. All was not lost -- I suspended them from the tent rails.
Each show brings lessons. The removable L-brackets are now stored on the rack so they can't be forgotten; sewing tabs to secure table skirt corners when the wind blows; carefully hiding storage boxes underneath; hanging tent side walls lower to prevent a gap; finding my new shop name banner was too big. There will be another opportunity, so I look forward to making things right!