The Dungeons of Naerband (yes, it’s one dungeon) will require a full fellowship, while the Court of Sergost requires a light fellowship. These dungeons are the focus of this weekend’s testing, so the developers are eager for feedback about how the dungeons feel to play and how they’re tuned. If you already tried to jump in once and had issues, you can be assured that those issues should now be fixed, and if you encounter any other problems… well, that’s the point of testing, isn’t it?
Source: Official Site