I'd just only wear it while in the convention center. Fold it up and put it in your pocket or bag or something.
Done: Captain Malcolm Reynolds, Eleventh Doctor, Captain Levi (SnK), Captain Jack Harkness, Vash the Stampede, The Kid (Bastion), Booker Dewitt, Arno Dorian, Jaime Lannister (S01-04), Connor Kenway, Mad Max, Shay Cormac, Jaime Lannister (S04-05), Otso Berg, Jacob Frye
In progress: Jacob Frye 2.0
Future/considering: Snake/Big Boss (MGS3), Spike Spiegel, Mako (LoK), Poe Dameron, Arno Dorian 2.0, Aldo Raine, General Hux