Question on nfsroot shared by multiple targets

Hello,

I have the following setup: one server, with DHCP server and NFS-root 
for an embedded target. With one target this works OK, but now I want to 
add another target. The problem I see is that both targets are going to 
write into the same logfiles and lockfiles.
I did setup the DHCP server in such a way that the NFS-root of the 
target points to /nfsroot/<last octet of IP address>. But for this to 
work I need a copy of the complete tree for each target board. I would 
prefer to have only one tree for all targets, as this saves the effort 
of keeping all trees in sync.
I could create a smaller NFS-root per target, with only /etc, /var and 
some other directories and mount-points and mount all directories from a 
central nfsroot using the local fstab in /etc. This could work for /var, 
but I would still need to keep /etc in sync.

Is there another way to do this, or is this the correct way to setup a 
multi-target system?

Kind regards,
    Johan Borkhuis