Hello, I want to start a medieval rimworld playthrough and want to roleplay as a group in a Castle. My Immersion was shattered by raiders swimming through my moats, breaking through stone walls with bone clubs, and stabbing my archer through an embrasure.

I looked for mods but I couldn't find anything useful to me, so here my question:

Is there any way of disabling swimming for everybody, or create no-trespass-zones that even enemies won't enter? Or maybe a special invisible building I can put over the water that blocks movement?

And I feel like hitpoints of walls, at least for medieval purposes, are at ~2% of where they should be, is there ways/mods to make them MUCH sturdier, or even impervious to garbage weapons like knives and clubs?