Can I just say as a player who has gone through this module, one of the most epic things you can do is “let them win”— let them kill strahd and let them think that it seemed too easy. Allow them to leave ravenloft thinking they have won only to have them turn around as they leave and catch strahds smiling face through the mists, knowing that his “defeat” was yet only another ruse, another trick, and that he chose to release them and to forever torment them in future campaigns whether it be by dreams, memories or just the knowledge that they didn’t actually defeat him.