What is the hardest thing about writing an entire campaign like CoS? And how long does that kind of thing take? It looks very difficult and very impressive!!I wrote the first draft of Curse of Strahd in 3 weeks over the Christmas break two years ago. I’ve never written anything that big that fast before, and I probably never will again. I was possessed. Usually it takes me 10-12 weeks to write a first draft.Comment from discussion Chris Perkins AMA.