I know, I was the same way until I saw people doing it. XD From DDD I've seen requests for Avatar people, and Idgie pimped for a Maya Fey recently. You could describe the game's premise a little to get people interested, and maybe give a short summary of where you are with Zelda and that you're looking for someone to help you go through canon, I bet you'll get someone who's interested.

Awesome! And if you ever need any advice on organizing a big event, there are lots of people on the comm who'd be willing to help. You could check with some of the people who've done big tournaments in the past (look through the events comm) and ask them what did and didn't work, for starters, and get with any castmates you have to talk things over.