For anyone who might be visiting the Disney Ambassadors, one of our former
Disneyland board DISers "DLR29" (Stephen Lim) is a Disney Ambassador this year, and will be at D23 all weekend. Be sure to say hi to him, and let him know you're on the Disboards. He's a wonderful person, and did the college program at Disneyland, then moved to WDW, where he has been working in various positions there.
As for the D23 Expo, I'm done stressing. Now, my roommates and I are in planning mode, and we know we'll have fun regardless of the panels we get in. In 2017, we went to various panels and had a wonderful time in the unplanned ones we got in.
We're trying to figure what type of sit-upons to take to save our tushes. I'm bummed about the foldable chairs. I have one that fits in my backpack, and used it in the early morning queues, and not during the day. It really saved my knees. I have my Fantasmic pad that fits in my backpack, and a little inflatable cushion I might take.