The RSVP deadline I gave my guests is October 1st.
Out of the 196 people we've invited, I only have RSVPs for 128 (some of which never even sent me RSVPs, I just know they are coming because they are immediate family).
This means I better be getting a lot of little envelopes in the mail this week. What is so difficult about RSVP-ing? If you need a hotel room, shouldn't you already know if you are coming or not?