Backup debconf state

[Erwan David <erwan@rail.eu.org>]

Hello everybody

If I want to be able to fast reinstall a debian after a crash, I already 
backup /etc (including /etc/apt), a file with the output of
apt-show manual
to get the list of manually installed packages, /etc, but It would be 
handy to have the state of debconf (with all the answers I already gave).
Is a backup of /var/cache debconf sufficient for this ?