Since it is an emergency situation and safety is key most airlines work together in these types of cases. We do know that they were sent to a secure area so that would ensure to no one was able to filter in or out of the group so re boarding would have been quite easy. Since they appear to be using an AirTran gate I would imagine that the AirTran personnel would have stepped up and assisted as needed.

A big good slap on the back goes to the crew and passengers for a safe landing under pressure (or without for that matter).