Master of Mutant Design
If you can find it, I still suggest finding the article in Dragon 336 to augment BoS. Or at the very least check out the Kargatane Book of S series for a ton of fan made Ravenloft material, some of which is advice.Really, I think going for a creepy atmosphere is probably best, so maybe I'll look into Bane of the Shadowborn. I remember the 3e description of the domain around it seemed actually eerie. But the 3e third-party stuff was generally creepy and they dodged the issues of the previous edition by simply never releasing any adventures that I recall.