I do the same as Craig with the bags. I get Hannaford supermarket brand. I put the ball in so one of the bottom corners of the bag is centered like a dunce cap on the dough. One twist of the bag and then tuck it under the ball. As it expands, it will take more bag with it. And placing it in a corner of the bag keeps the ball round. I found the corner placement didn't really matter with a small, 300g or so, doughs. These are 435g. They would sometimes expand into a corner and lose the round shape. 12 fit nicely on a half sheet.
After use, I keep the empty bags in an old Locatelli Romano cheese container in the fridge. I get several uses out of each bag.
Edit to note these are not Detroit doughs, just dough balls going into a fridge