What's needed for a move?

I'm about to move a working system to a newer O/S version, and to another H/W platform, I'm thinking of what I need to backup and move to get a functional result. The originating system runs these functions, Samba PDC and file server using LDAP as the user database. I know for sure that I need /etc/samba/* /etc/openldap/* /var/lib/samba/* and /var/lib/ldap/* Should I watch out for more?