Originally posted by optOut:

Also of interest is that if the chimney's cap is too restrictive, the campfire will cycle on/off sporadically.

I would have never considered a treehouse! that blows my mind

One of my bases in a swamp is built where 4 or so indestructible trees are close together in a circle almost, since stone can clip into those trees and be supported, I managed to make a stone floor that way between all the trees.