I am having major trouble with deciding on a restaurant for our reception dinner. We invited 33 people, plus us 2 and 2 photographers, total 37 people. Problem is I have NO idea how many will attend, it could easily be all 35, or could be 15! How am I supposed to know what size private room to book? RSVP's are not due until 5 months before the wedding. Room sizes and F+B minimum vary greatly for 15 or 35 people. How far in advance did you book your venue? I am afraid all the best places will be booked up for my date by the time I know guest numbers.