This is how I found Witherfang;
"Hid-ified"
I helped the Great Oak -- I think this was his name -- with the task of retrieving his achorn. But I asked what he'd give me in return before accepting the task, which he offers a piece of his wood. This wood is actually a wizard staff, which until recently was what I was using for Morigan, as it was a good item. This staff is also a key to unlock a foggy mist area(some kind of barrier) that's between the east and west entrances -- sorry, not at home, so not sure which map area this was called.
Anyways, once you pass that barrier, you see Witherfang's wearwolfs. I actually have not fought Witherfang yet, as they barricaded themselves in a dungeon. I ended up leaving that area, because the only route lead to a dragon which kicked my party's arse at that time.
I learned from Mass Effect to invest in persuasion, so mine is almost maxed out. 🙂
I finally lived through a wolf Ambush, but just barely! 😀 Now that I've done so, along with the Darkspawn ambush and the messed up bear and wolf ambush, the game has thrown harder ambushes at me. O.O
Anyways, the game is awesome. I probably should have gone to the dwarven area much earlier, as it's too easy for my party right now. I had to leave Dreaden -- think this is the name, because I couldn't take on some of the mercenaries in the back alleys. 😱