Bwcause you asked here they are in no particular order.
Firewood. What are they burning? Nobody, not even bugbears want to go off into the woods as soon as another log is needed for the fire.
Waste: Where to the people go? Where is the trash thrown? Most semi permanent camps will have a waste pit for all the waster/garbage.
Fresh Water: Where does it come from? Do the Bugbears truck it in?
Gates? Not much point building a pallisade if there is no gate to close to fully inclose the area against assault.