Not sure if your event happened already, but I'll put my two cents in... Central Jersey Geocachers had a table at a Monmouth County Outdoor Expo last year that was well received. I had made a fold-out display board with the title "EVER GEOCACHE?" (you know the cardboard displays kids use at the science fair) with different info from gc.com such as different types of caches (traditional, virtual...), pictures of different cache containers from normal to a couple unique plus different sizes, explanations of travel bugs,... I can send you a picture of the board to give you ideas.... On the table for the people to see were about 10 different cach-tainers from ammo cans to bison tubes and lock-n-locks... we had some TB's to show (however we taped their chains to my over-sized ammo can so that they didn't 'walk away') ... we had a couple different GPS units (again secured to the table) plus we had flyers printed up explaining our sport and we also had a couple real caches to be found. We had decided not to make it an official geocache event, just an 'inform the public day'... but after reading the posts here I can see the good in that.