Persuade them that they should have a projector of all the people involved in helping at the event...and each persons logo details etc is on loop on a huge projector.........INCLUDING YOURS!
ive done this a few times, and it works really well, cos A. everyone can see your email contact details photo etc even if you dont get round to seeing them, and B you can use the big image as part of a trick....for example have a selected card be poking out of the pocket of your jacket in the big projected image of you...................
Usually a big organiser will go for this because its a good way for everyone there to see who was invloved and the other businesses will agree to it cos its promotion for free on a big screen with 1500 looking at it for free.............plus they will another 50- 100 thousand people cos they shud all have mates...............
-hope my lil rant helped
GET THEM PROJECTING YOUR AR*E !
