Should you be in the area for faire next season or are a local & may not know about it, you may want to visit a restaurant called Excalibur (http://excaliburrestaurant.com/index.php)...it looks pretty cool! :)
There is a medieval dinner theatre in St Louis, in or near Lacledes Landing. I've not been, but it looks interesting!
Looks like a beautiful restaurant. I like how they have garb available for dinner wear. I wonder if they would cater to Ren Groups in their own. :)