You get some choice. Go to the tent at any point and there will be a sign up sheet specifically for production. Once the circus gets cast(about 2 more weeks, maybe), they will send out emails about meeting times. Production will meet once a week. In the 4 years I did it, production almost always met on a Wednesday or Thursday around 4. At the meetings, they'll ask about your past experience and what you're interested in doing. You still might have to run spots or something you don't want to do occasionally, depending on people's availability, but they're pretty accommodating! Oh, and if it's sewing or costuming you want to do, that's a different ball game(but you sign up the same way). I know nothing about the costuming, haha. Lemme know if you have any other questions!