Baby shower

My baby shower is June 22nd. I booked the hall for 50 guest & I mailed out about 90 invites. 53 ppl have already RSVP. (I am able to change the seating number to accommodate everyone to be seated comfortably)

I created a site online where ppl could RSVP & it gives the option to bring a plus1.. a lot of ppl reserved for a plus 1 & some are ppl I don’t know. (Which is fine)

I don’t think the plus 1s are really coming. I think ppl seen the option to bring someone & automatically signed up for it.

Although, 53ppl did RSVP I don’t believe that they all are coming.

How do I plan? I don’t want to over book seats...