Here are some random shots from my phone. This is an annual event the first weekend in May at the Fullerton Depot (California) BNSF brings loco's in and give tours through them. Disneyland often provides a loco or something similar. The ATSF 3751 has made appearances in the past. Lots of booths of the usual toys, train clubs etc. The tent in the last photo is 330' x 40' and is packed with layouts of most all gauges, including a Lego layout. Great crowds, near 30,000 each year. 2nd and 3rd to last pictures are the most important. All the food vendors plus the cafe in the depot. TTOS & TCA are there with layouts and literature.
Steve