Gary:
I just tried something similar with an NFS share and was able to do it.
My situation was I have //<computer>/mnt mounted in ~/mnt. I was then
able to (as root) mount -o bind ./mnt/archives ./mnt1 while in my normal
~ folder.
You could also try mounting the share locally or sharing the "doc"
folder in addition to sharing the entire volume.
Everything I try yields either the `is not a special device' or 'mount
point' error as previously described whether I choose the mount point
itself (e.g. /mnt/nas) or any directory (e.g. /mnt/nas/doc,
/mnt/nas/doc/household, etc.).