Well there are Worgs there that killed by the worms, This is important because they spawn in a pair.
Once you kill the worms the spawn rate of the Worgs is insane. After a couple of min it becomes an instant spawn between the four spots.
So just run around the begging of the cave(as shown in the pic) and never run out of mobs, and yes they do drop Artic Fur
here are the 4 locations:
Guess it would also be an awsome place for Grinding because you have no downtime between mobs.
Me and a shammy friend spent 3 hours here without stopping once.
