Plan side quests around the two commitment points
The published base-game sequence has 32 quests. Quests 1–12 cover the Trosky story; quests 13–32 continue in the Kuttenberg region. Main quests run in a fixed order, so planning is about optional content and saves rather than reordering the story.
Before starting Necessary Evil (8), finish the Trosky side quests you care about and keep a manual save. Do the same for Kuttenberg before Oratores (24). These thresholds can fail affected quests; they do not mean that all travel to the region disappears permanently.
Storm (12) leads to Kuttenberg. The regional carriage later allows return travel, but it does not restore a failed side quest. See the save and commitment checklist before advancing and check your journal after the transition.