I am working on my seating arrangements for the reception. I am having a buffet style and per advice I have seen given by WW, I have decided to assign tables and not specific seats. Now my problem is I know there will be people who either don't RSVP and I am unable to get an answer out of or people who say they are not coming and end up showing up. I'm sure this has already been talked about on here but I couldn't find anything recent. Is it okay to make a table just for those who do not RSVP? Or should I just let them wait and see if there will be any open seats because of others who RSVP'd and don't show up? What is the proper etiquette on this? Or what is the smoothest way to handle a situation like this? Thanks in advance.
ETA: Who calls those who have not RSVP by deadline?