Thanks for this information- totally helpful! I wasn't sure of the size of the event, and 500 sounds like a good amount. Love hearing that you got to meet some real Imagineering Legends!
I've listened to the entire catalog of Retro WDW (unfortunately, because I want more!). Together with Progress City U.S.A. they make up my absolute favorite Disney Podcasts. And you are right, the podcasts really sparked my love of Disney history- I've been reading everything I can get my hands on.
Thanks for the information and the introduction. A friendly note that is much appreciated!