>>2722001Daniel Bears says to cut away the side of a hill entirely and keep it on high ground. Slanted roofs will encourage water to drain around the structure rather than into it. mass loaded vinyl would be a good modern cover for the whole thing to keep moisture from coming into direct contact with the wood. it's a good idea to dig a pit underneath and build an elevated floor because even on high well draining ground, the floor will get muddy.
It's gonna be full of centipedes so consider breeding a lizard army