Every GM tweaks the base rules to suit their own style, and that of their players; this is the legendary DongMaster's second edition of his house rules.
At the height of the Codominium, a Khuzan clan adapted part of an existing natural cave system for use as a hunting lodge. Each autumn, the Khuzdul would travel there to spend a month hunting; the rest of the time the site sat empty. It has remained hidden for more than a millennium.