Miss Moe,
No advice for your medieval festival but it does sound like a lot of fun. I know there is a Renaissance festival in Gig Harbor, WA. I'll post a link and maybe you can glean some ideas from there.
http://www.washingtonrenfaire.com/
Also, would you mind telling me what books you are using for your study in the coming year. We are going to study the Fall of Rome to about 1600AD. I've gathered many resources, I'm just having a little trouble focusing.
Thank you,
Cindy