(I wasn't sure where to put this...if it should go somewhere else, let me know and I'll move it.)
I think the title sums up what is constantly going through my mind at the moment. The backstory: I had a very tough time getting my FMIL to get me her invite list. Once I did, there were no problems...until it came time for the RSVPs to come in. I gave them an extra 2-3 weeks since we moved right before they were due since the USPS is notorious for messing up mail (in hindsight, a bad idea). Once that 2-3 weeks was up, I had to hound my FMIL (through my dear FH) to contact those on her list we hadn't heard from. In addition, I hadn't heard from a few of the people I invited. All of these people with a lack of response were local. A couple on both "sides" responded, but there has been a lack of response overall. One of my former coworkers (who left after she had received the invitation) has not responded after saying she would before she left. She won't answer my emails or even return the phone calls of the receptionist (who is going).
If any of that doesn't make sense, I apologize. Anyway, I am so worried that some of these people will just show up that day when I guessed that their lack of response was a no. What do I do? What do I plan for? I've already given the venue the final numbers and, while they provide enough food and drink for 5% over the final guest count, they won't have anywhere to sit in the reception hall. I am at a loss of how to handle it. Should I give my wedding day-of coordinator a list of these people in case they show up?