Dan, if you’re not familiar, I posted quite a few photos of the Greenberg show (the one that Greg referred you to a few posts ago) here:
https://www.flickr.com/photos/8994372@N04/sets/72157637870433253/
SCL has a group board on flickr too, there should be other people’s pics of it there. Of the displays we’ve done since I joined a year ago, this one definitely had the highest number of different people involved in it. You can also see there’s plenty of room for more.
The other larger one I was part of this year was the Ligonier Valley Railroad Show:
https://www.flickr.com/photos/8994372@N04/sets/72157645497921823/
Hopefully that gives you some ideas to get started.