mimimal backup of working copies?

Does anyone know of a way to backup/move/copy checked out working copies
such that you can skip all the parts that 'svn update' would
reconstruct? I'm about to copy the home directories of a machine used
mostly for checkout/build/test operations to a remote location and it
occurred to me that most of what I'll be copying is unnecessary but I
don't want to disrupt the directory structure or hooks to the repositories.

-- 
   Les Mikesell
    lesmikesell_at_gmail.com