We did email STDs and are doing paper invites for our wedding but online RSVP via our wedding website (so no RSVP cards).
Is it too casual to just invite members of the wedding party and our immediate family to our rehearsal dinner via word of mouth/text or do you feel its necessary to "formalize" the invitations and collect RSVPs?
Our rehearsal dinner is expected to be 16-19 people if we include just us, our wedding party, our officiant (who is a friend), and immediate family, plus SO's of those already mentioned, so it's a pretty small group. We are having it on site and catered by our venue.