Wrap Around Labels
These WILL require some excel and word savvy to make work correctly. They're a mail merge. But - if you want to try it - go for it. The RSVP labels are just a plain file, no merge - but they're for your RSVP envelopes, which all have the same address. Oh - and the "not married" labels are really for any couple who don't share the same last name.
Just the file I printed from. You might have to update the fonts if you don't have the ones I used. Check the Invites Template page for mor