The young man posing in fron of it is "Juggy" Prevost, seat butcher and son of the show's Manager Don Prevost. Juggy was a top notch seat man.
I wish I could identify the other two folks standing in the wagon but it eludes me right now.
Bobby Wyman also worked the wagon and of course that's where brother Bill held forth.
Here Jimmy Divine, Jr. in the Floss Stand spinning candy and that young man, checking up on him, is none other than Mr Juggy, as Tiny Tim would say.