RSVP freakout- too many people!

So, we invited 291 people, but about 50-60 of them we were expecting to be no's because of the holiday weekend (getting married memorial weekend), and because alot of my dad's extended family was invited because we felt that we had to out of precedence from other weddings in which we were invited but never went... anyway, we have 105 yesses, only 12 no's, and still waiting on 176 more RSVPs and I'm starting to worry that we are going to have alot more yesses than I anticipated :(

A few of the extended family actually RSVPd yes too which gave me a bit of a panic attack since I've never even met them and we just assumed they would say no! I'm really hoping that like 50 of those 176 RSVPs end up being no's lol