All I report on what happened at WL. MS CM was handing out bands to people who didn't have their party present. A adult girl said that her member parents decided not to go and she was given a band without showing ID. I was handed three band. FYI, Disney wants all party bands on your right wrist, I didn't know and put ours on our left. Based on that you might have good luck getting an extra band.
Bill
When we checked in at Epcot they put the bands on our left wrist.
Well we had a CM at moon light magic comment that we had them on the wrong wrist and at MVMCP they made a point to put them on our right wrist. Guess it depends on the CM.
Bill