Thanks, John. You are absolutely right, and I don't have fleas either. The convention attracts many fans from 600 to upwards of 1,600. They come from all over the world just for this convention. As a modeller, I have attended this meet for many years. It is an unofficial meet, unlike the NMRA. Bids are made in advance to host meets and are voted on by the attendies. There is no official association. They are well organized, held in major hotels with facilities for model contests, clinics and dealers. It attracts people from all walks of life, knowledge and skills. And you are also right in the fact that great effort is made by many in the research of their passion. I am a small example of this. I model the D&RGW (specifically Chama, NM) on October 17, 1937 at 4:00 pm... ;-)
Many like myself will research and model equipment, structures and scenery to represent the period as closely as possible. Visit my web site to get an example. We can't have the big stuff, so we have more of the little stuff.
The convention is specifically geared to narrow gauge and just about every rail road is represented there. I urge everyone to attend at least one of them and you will find it to be an extension of your interest. It is generally located in an area where a narrow gauge rail road exists. Denver, Colorado Springs and Durango are the most popular locals. The west coast has an emphasis on logging.