Baz answer Wie waren deine Ferien?? or Wie war dein Urlaub? is correct. It's the question How are your Holidays - you are asking a specific person about his/her holiday.
You may also say Wie waren die Ferien?or Wie war der Urlaub?. This is a more general question. It could be asked to a group (e.g. a teacher could ask a class and everybody could tell about his/her holiday).
Wie geht's Dir die Ferien? is wrong. Wie geht es Dir in den Ferien? would be something like How do you feel during your holidays - it's no about the past and it sound a bit strange.