Considering that in June 2021, I said we'd have full stadiums without masks for football season (since outdoors) and a full RAC, with masks likely for basketball season (since indoors) and was right on those, why would I have had an issue with an outdoor party without masks?
We had a couple of parties at our house without masks that summer and I never wore a mask after being fully vaccinated at the end of March 2021 unless requested to do so, since the vaccines made the risks from infection essentially like a flu, which didn't worry me.