When Adam said slideshows usually last about 2 minutes max, I realized that I was approaching it the wrong way. I was trying to tell the story of the Williamsburg Competition, but in 2 minutes, what I should give is the sense of it: what the event was like, what it sounded like, what it looked like, and people's attitudes at it.
As soon as I started thinking this way, I immediately saw how the slideshow can be rearranged and trimmed. So that should be fun to do. So, another good lesson, and thankfully it wasn't painful!