Dear FI's Misc Family & Family Friends,
Hunting down your addresses was a PITA (and we don't have phone numbers or emails for the vast majority of you) - so, maybe you could go ahead and RSVP? Especially, seeing as though the RSVP date was a week ago...
Oh, and I get that in the "biker" culture you probably don't get a lot of fancy invitations to events, and while apparently some found them to be a laugh riot (according to FMIL)- at least that group actually sent in RSVPs.
Signed,
Annoyed bride-to-be that is at least relieved that I don't have to try to do a seating chart in this situation...