I am making my own wedding invitations (all 400 of them), and am putting in a RSVP. I want to make the RSVP a postcard, but I don't know what to put on it. I plan on printing them out myself. Can anyone help me out? I'm just a little stressed right now

. The invites have to go out here soon. I'm done with the invitations, now I'm just working on getting these made. Thanks so much!