So glad you posted this memory. The then fledgling Midwest Division of the Independent Hi-Railers were participants. Frank Sanchez and I drove out with Frank's yard modules, and Jim Marek and Joel and John Hastings flew in. I remember the reverse loop modules you built so that this large layout could operate as one long continuous mainline. As I recall we could run 4 or 5 trains on the layout at one time, but we needed 'spotters' who had head sets (along with the operators) to ensure the trains stayed appropriately separated from each other (this was before command control entered our world). What fun! I bought my first ZW transformer at that show, along with my first scale diesel, a Weaver SD 40-2 (in Milw Rd colors of course) which still logs hours on my layout, albeit with a PS-2 upgrade. Had a great time over a meal with Al Spaventa, and I recall the tour you gave us of a home layout (can't seem to recall the owners name) that you built for a friend.
I hope you are well and still enjoying our hobby.