I know that I will need "Save the Date" cards, ceremony and reception invitations, "Thank You" cards, and bridal shower invitations. To save money, I'm looking at wedding invitations with room for reception information so I don't have to purchase them separately. Are RSVP cards necessary, or can you list a contact number or a website (like the lovely ones provided by this site) for the guests to RSVP? I am having a formal black tie wedding, if that matters. Thank you, and God bless you all!