Greetings Blake:
Not trying to pass the buck here, but I'm going to forward your request to the Division of Forest Resources within the Illinois Dept. of Natural Resources (IDNR) as it appears you're looking for more concrete, legal-based answers to your very valid questions. Therefore, I will let IDNR's lawyers and staff specialists entertain your specific questions regarding Illinois Forest Management plan requirements, mineral interests, lease and development questions, etc.
I've copied Mr. Mike Mason, IDNR state forester, and Mr. Paul Deizman, IDNR forest stewardship program manager.