Thanks again lleb,
I determined that autofs was installed and with a little research I setup my configuration files. With the server running I can access my nfs mounts as if by magic. No need to run my script first
If the server is off line and I attempt to access the parent directory of the mounts in Nautilus I get a blank display as if the mount names are not there. I can navigate to somewhere else as Nautilus is still responsive.
On the other hand with gnome-commander if I click on the parent folder gnome-commander goes off into la la land and I eventually need to force quit.
Well two out of three ain't bad !
Again my sincere thanks.