We were there and had the baby during opening week, Of course they knew we were doing child swap so everyone but me and the baby went on the ride. They gave me a piece of paper saying that I was child swap and that I and one other person can ride.
I did see other people who went into the child swap area with a child that just did not want to ride at the last minute and there was a guy in there making sure that everyone had a ticket.
They were very strict about the 2 ppl rule, you could only bring one other person with you once your party got off the ride. Now, if you had a large group and half wanted to ride and the other half wanted to stay they might give each person in the child swap area a ticket but I don't know how that would work. They told me that the reason it was so limited was because of the wait time on the ride and how busy it was.