Small (out-of-state) family gathering for Thanksgiving?  Is it worth the risk this year?

I'm really torn about this.  

On the one hand, we've not been able to go home (different state) to visit family since last Thanksgiving, and we would love to see them.  They've also made it plain that they hope we will be there.

On the other, 2 family members are high-risk (in their 80s, and both cancer survivors and not in great health), and there's the potential for members of 6 households (although only 12 people max, more likely 6-9, depending on which grandkids -- all of them grown -- choose to attend or skip it) to interact indoors over several hours.

Our (extended) family's typical Thanksgiving celebration is 30-40 people or more, so this year's plans have been scaled way back.  Since all the kids are grown and gone, and half of us moved away years ago, we no longer get together for Easter, Christmas, birthdays, or other occasions.  Thanksgiving has for years been THE big family dinner and we all make our best effort to be there.

This year is different, of course.  I want to go, but I don't know if we should.  I don't know what to do.  Advice?  

Thank you!