Before they entered the rock formation, the group broke again into three teams, divided between the different guilds. The rock formation had more than one entrance which led to the central basin.
The plan was for the three guilds to enter from different directions and converge on the basin where they would execute their assault. The last contact with their scouts indicated that John's group was still resting within the basin.
Now that they were close to their prey, they stopped moving hastily as they entered the rock formation. They were thinking that if they could secure a surprise attack, it would make the fight much easier.
There were some low-level monsters on the paths. Earmouth arranged for one or two players to deal with the monsters as quietly as possible so that it doesn't hinder the others' advance.