Place 2m wood beams along the floor surrounding the fire "pit", as well as along the bottom of the "chimney"... once you have those, you can't walk into the fire.

This also makes it so the smoke cannot go anywhere but upward (can't go into the house due to the opening being too small for the smoke particles to pass through)

If the meat falls in the fire, simply step forward and get as close as you need to since you are blocked from going into the fire or getting burned.

https://steamcommunity.com/sharedfiles/filedetails/?id=2857747607

https://steamcommunity.com/sharedfiles/filedetails/?id=2857749238