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.
The Keep on the Borderlands is set in Dyriamarch, a region of Melderyn claimed, but not effectively controlled by that kingdom. There is also a letter meant to be handed to the players before the adventure.
The Peonian Crypt in Tashal is more than just a hallowed burial for the faithful of the Bringer of Life Renewed. It is a trysting place for illicit lovers, a highway for the Lia-Kavair, and a facility for private meetings. Maybe they should fix the lock …