(Source: Storm King’s Thunder, pages 99-100)
The Giant problem might have been dealt with earlier, but the Zhentarim still has their presence here. Mornbryn’s Shield is one of their safehouses, and you can assume that the villagers here are Zhents in hiding.
Micro-Worldbuilding Opportunities: They do not know about Mornbryn’s tomb, however, but the Harpers do, and the latter group would want to have a group of adventures quietly search for that tomb and plunder its contents before the Zhents catch wise. For what purpose? Well, that's the matter for another campaign creation.