Does the Paris Visite Travelcard for zones 1-5 get me to Chateau de Chantilly?
Yes the Paris Visite card will cover Chateau de Chantilly.
Paris to Chateau Chantilly by train take RER D train towards Creil until Chantilly-Gouvieux station ((any station on RER D line, such as Gare du Nord or Chatelet les Halles). Walk from Chantilly-Gouvieux station to Chateau de Chantilly is about 28 minutes. You can take a free city bus from Chantilly-Govieux station until Chantilly, eglise de Notre-Dame station (bus schedule).