When I go to to the barter faire, I volunteer to sit with people in the calm tepee. It’s nice in there. There is a fire going in the middle that makes it warm and the light colored walls reflect the light from the fire, making it light inside as well.
There is never any smoke. The guy who tends the fire says this is because he burns saskatoon(amelanchier) wood. Saskatoon or serviceberry is native to every state in the US except Hawaii and it grows on both sides of the Cascades.