Check the midwest buckskinner info page. I don't know the URL, but Bullseye, Trappers, and Gemmer are listed.
The bullseye club is located near DeSoto MO, and is primarily a modern gun club. However, there is a strong ML contingent in the membership.
Bullseye hosts a rendezvous once a year in addition to a woodswalk in Feb.
GEmmer is a ML club with a range located near Robertsville MO. They host a club shoot each month and several events open to the public each year.
The Trappers of Starved Rock are located in the west county area, near St. Charles. I don't know what range facilities or what type of shoots they have.
There are also a coupla modern clubs in the area, with a few members who shoot black powder, but I don't have any contact info on them.
J.D.