This should be a fun event. The campus is a very impressive facility and will eventually store many of the rail cars used on the Gold Line after the 11.5-mile Foothill Extension project opens in the first half of 2016. There will be a few rail cars on hand for the event to see.
The project is adding six stations to the Gold Line beyond the existing Sierra Madre Villa terminus: Arcadia, Monrovia, Duarte, Irwindale, downtown Azusa and Azusa/Citrus College/Azusa Pacific University. There are also plans to extend the project to Claremont and Montclair, although that segment is currently unfunded.
Here are some pics of the campus: