Every camp & most homes up north had wood fired saunas, nothing like it. Opens the pores, keeps you well, takes away colds, & makes you feel like you got 4 hours of sleep. You build a mesh cage on a small stove fill with stones from a creek or river ot they'll explode when they get hot. I'd use a 15 gal SS beer keg with one end cut out open end on top, weld a pipe near the top & bottom & thru the wall of the stove in the back so it creates a siphon effect so when fired up the water in the keg would boil & we always had hot water. Also had a $10 12v pump for cold or warm water showers. Up their men, women sauna together even families. Old Finnish tradition totally non sexual. The advantage is you're the cleanest you will ever be, feel great on hardly any water at all.