Random thoughts, in no particular order...
Sorry that I missed the original OGR tours - they occurred during a gap in my York attendance.
Re the Enola Yard, I'd love it, but tours of railroad operations can be very difficult to organize due to security considerations.
It might be simpler to find members who would host open houses for self-drive tours than to arrange for bus transportation, but I'd be open to either. Would definitely participate if they were held BEFORE the meet - afterwards, there is a bit of meet fatigue.
If you haven't done so, be sure to visit the train club in Red Lion - they usually have an open house on Wednesday and Thursday evenings of York week. (Hope they'll be open in October.)
