I'm not sure how it is structured now, but the Regional HS coordinator used to be over the access areas as well. That would be Tommy Whitehead. You can get a message to him through the Reg. 4 office. You may want to check with the Reg. 4 office to make sure he is still the contact person.
If you strike out there, get in touch with LT. Col. Glenn Moates in the Nashville Boating and Law Enf. Div. office (615) 781-6580.