In terms of the mount point.
I have my NAS set up with a static IP
I have NFS installed on all the PCs that I want to connect over the lan.
I have then edited /etc/fstab and added this in as the last line, where 192.168.11.50:/Servers is the static IP and the directory tree that I want people to have access to, /media/nas/ is the mount point, nfs declares the filesystem and the rest how I want it to be accessed:
192.168.11.50:/Servers /media/nas/ nfs rw,hard,intr 0 0
On boot up each PC/laptop etc has a disk already mounted as if it is local. By changing the directory after the IP people can have shared or separate access to the NAS.
In the case of laptops this works on harde and wireles connections and if not lan connected works with the normal user settings and directories.