Hi there. Our wedding will be in Vegas, so the majority of our friends will be coming from NYC and LA, and family will be coming from MD and upstate NY. We had planned for 100 guests, but our preliminary list with family and friends goes WAY over. Due to the 'destination,' we know a decent amount will not be able to make it, so we have 'A-list' and 'B-list's. For the STD, is there a classy way to include some sort of RSVP without being tacky? It's just that we know certain people won't be able to make it, but if we want to invite 'list-B' people, we feel like they should receive a STD early as well to make travel preparations. Does this make sense? And again...trying to be classy and respectful...Thanks!