Look at the guidelines that just came out from Tacoma-Pierce Co. Health Dept.
https://www.tpchd.org/Home/Components/Blog/Blog/31757/333
https://www.tpchd.org/Home/Components/Blog/Blog/31757/333
Among the steps they advise:
Keep your gathering small—five or fewer guests from outside your home.
These activities have the greatest risk of spreading the virus that causes COVID-19. We advise you to stay wide awake and avoid these:
- Door to door trick-or-treating.
- Trunk-or-treating, where kids get candy from people in cars in a parking lot.
- Crowded, indoor parties.
- Indoors haunted houses where people are close together and screaming.
- Hayrides with people outside your household.
- Traveling outside your community to attend fall festivals.