Copying Campaigns

First, forgive me if this has come up before, but my 'forum search-fu' is weak.

I often run pick-up games, where I provide a set of pregenerated characters. I have several campaigns with pregens of the appropriate level.  

Because I reuse those pregens a lot, I have to copy them individually, and then assign them to a new campaign. 

I'm wondering if there's a way to copy the entire campaign and characters.  (Or if there's another way to accomplish the same thing.) 

You cannot copy a campaign or mass-copy characters.