The fast pace of the environment was fun at times (I worked the fair and another expo center event, because nobody else wanted to hire a college student).
What I wish was different
I wish that there had been more training. Some of it was very much a thing of, "here's what to do, go do it", with little to no actual instruction.
Advice
Drink lots of water, and make sure that you sit down during your breaks. Also make sure that you are contributing as much as you can, since it makes it easier for your teammates and you.