>>> I want NetworkManager to not over write /etc/resolv.conf
[...]
> My setup is that I was a dhcp server to give out IPs and DNS info.
> That way I can control those things without having to do so on every system.
Populating `/etc/resolv.conf` from the DHCP-provided info is a useful
part of "control those things without having to do so on every system",
so I don't see why you "want NetworkManager to not over write
/etc/resolv.conf".
Stefan