Bastille Castle

[Larb]

I think you have already established a lot. There's a stream nearby for example that has been redirected or channeled at some point. If there was no village right around it initially, then the castle was probable built near one or two or more, or perhaps between them. Probably as an effort to establish a zone of control - maybe over a border territory or road or whatever. And people have migrated to it since as it is the (new) centre of power, forming a new village.

Is the castle on a rise or hill? Is the village below? Or is the terrain relatively flat with the village buildings close huddled up around it? (the latter would mean the castle will eventually become integrated into the defenses of the village if it grows into a larger walled market town, while the former would mean it would always be slightly divorced from it)

[foremost]

I was thinking it would be on the same level as the village, and would eventually become another layer of defense. However, the village would not be within the original moat, which was designed to protect the keep. Perhaps a outer moat (connected, maybe, with the first) could wrap around the village.

If the castle were to be in a time of peace, the village should be a bustling and diverse trade community, since it is on the edge of this kingdom and protects a roadway.