There's a potentially gamebreaking bug in Visions and Whispers.
If the player does not sleep in the inn and obtains the dream to find the dwarf hanging from the tree (Caldara De Berranzi), and then completes the "Lord of a Barren Land" quest, the bodies in the tree will disappear, and the main questline can no longer be completed, and will prevent the player from ever reaching Caed Nua.
Additional Notes: I went with Kolsc, and killed Raedric.
Possible solution: Move the corpse to the graveyard, and have an NPC point out where the corpses were moved to, allowing the player to continue. The trigger allowing the dream must of course also be re-enabled if this is the case. This is just a suggestion though.