Ok a couple questions. We only have an outer envelope and one for RSVP - do I address is to everyone in the family(we are allowing kids) on the outer envelope? What about the RSVP did you do a card to be mailed back, postcard or have them RSVP on your website?- how will I know if everyone in the family is coming if the send a card, do I ask how many are coming? I am so confused on these invites!