This branch of the Dunder Mifflin Paper Company has yet to be featured in an episode of The Office, however it was mentioned in the episode Branch Wars as a branch that has a bad reputation, just not as bad as that of Scranton.
Also, in the deleted scenes of Branch Wars, Michael lists a specific characteristic of each branch, explaining that Camden is "in a basement."
As of yet, unknown.
In the episode, Survivor Man, Toby mentions that a man named Mark Chisholm attended Ryan's wilderness retreat, indicating that Chisholm is a regional manager. It is possible that he is the regional manager of the Camden branch, though he could be the regional manager for Nashua, Akron, or Yonkers.