...
sshfs#[NetID]@[machinename].chem.cornell.edu:/home/[NetID] /home/whateever/youwant fuse defaults,idmap=user 0 0
He reports having to run the "sudo mount -a" command (to execute mount of all of /etc/fstab). This method first asks for the user's cluster password (i.e. it disregard the .ssh key), it then mounts the whole thing inaccurately, so that privileges show as "?".