Advice?

I desperately need some advice. So originally my fiancé and I planned to have a full wedding ceremony. Due to Covid and job losses, and reflecting on many potential drama starters in both of our families, we decided we would rather have an elopement type ceremony with one friend each, my grandfather (who’s lifespan is limited and hasn’t gotten to attend any of his daughters weddings and expressed great longing to attend mine), our officiant, and one photographer. This wedding is set for October and all involved have agreed to wear masks. We originally planned to not tell anyone and send pictures and announcements out after, but decided it would be better to tell family the deal and explain that it wasn’t personal and that it was our wish to do it this way. Upon beginning to tell family, of course EVERYONE we have talked to demands to be invited, and most of them refuse to wear masks. With the venue we could afford, only about two additional people could comfortably attend and still maintain social distancing guidelines, and we are pretty dead set on having our attendees wear masks. Unfortunately the venue and time has already been shared with them (my fiancé is not a great secret keeper lol) and they have insisted on showing up. What do I do? Move venues? Tell them we postponed? Demand they wear a mask or not show up? I’m at a loss. I don’t want to tell any family they can’t come (especially my future in laws) but we have a one year old who will be there with us and his health is my greatest priority. Also, I don’t feel like it would be fair for the family who is willing to follow the guidelines we set to miss out on the wedding while the ones blatantly disregarding us get to show up. We have considered offering the wedding live-streamed but the venue is in an area pretty far from a WiFi tower and I’m not sure how successful it would be.