SHABBAT

There is no room for leniency here, unless the driving will be done by a non-Jew. If a Jew drives even if he would normally be driving anyway, it is forbidden. If we would be speaking about a surgeon who must operate on that Shabbat or Chag, who might not agree to go on that mission unless he/she would be allowed to return on the same day, he/she would be allowed to return.