Dréri has asked you to help prepare Fellgát for use as a base of operations.
'Hello again, ${PLAYER}! Has Hórin given you our battle-plan for the Welkin-lofts? Good, good. We have some work ahead of us. The cold and the lack of resources this far up the mountain-side will make things difficult for us; we need to ensure our camp is fully-stocked and shielded from the elements!
'Our first order of business is to clear out the tents the hobgoblins left behind, and clean up their filth. It will not be pleasant work, true, but it needs to be done. While you are working on that, I will unpack our own tents and set them down here. Then you can prepare them for dwarf-use. We need shelter if we're going to survive up here.'
Dréri has asked you to take down the hobgoblin tents and clean up hobgoblin refuse in Fellgát.
Now that the camp has been cleared, you should set up the packed tents.
You should unpack and set up tents in Fellgát.
Fellgát is now cleared of hobgoblin structures and ready for dwarf use.
You should talk to Dréri.