Other than accepting one of the three vaccines, of course. There's time for any of them to be fully effective by AirVenture.
They're not perfect...nothing is. Here in my part of Washington State, about 3% of new Covid cases involve people who received one of the vaccinations. But that means that 97% of the infections are among the non-vaccinated. When you consider that 70% of the population here is vaccinated, that means 30% of the population are getting 97% of the infections.
Ideally, people will still comply with social distancing and masking requirements, where requested. But if you look at most of the large-crowd events over the past several months, people have basically thrown those out the window. I'd expect that AV will not be much different.
Ron Wanttaja