autofs

Install autofs (yum install autofs), then follow the link below
Auto-mounting the NAS using autofs -
Accessing Windows Or Samba Shares Using AutoFS
add an entry for the NAS in /etc/hosts

Something fundamental I've missed is that autofs gets the key on demand.
so -
[user@localhost ~]$ ll /cifs
total 0

which isn't promising... but

[user@localhost ~]$ ll /cifs/DLINK-EEF76A/
total 0
drwxrwxrwx 24 user user 0 2008-10-16 01:43 Volume_1
drwxr-xr-x 2 root root 0 2008-10-20 19:21 web_page

is what we want :)

A symbolic link simplifies access -
sudo ln -s /cifs/DLINK-EEF76A /mnt/nas