First hint: the way to the house above the cloud.
Second hint: keep going and keep looking at map.

Found it many thanks for your hints :)

I should have know to have packed my abseiling gear!

So how do you get warg liver?

Good question about the Warg Liver - since getting the quest I have killed the "top dog" numerous times and no sign of the liver. Perhaps it's a very rare drop and I need to keep trying, or perhaps something has changed ...

You can get the liver from windscream miniboss. It took me 5 tries when it finally dropped :p...

Thanks, i was just killing wargs mindlessly for days ahahahah

no way it drops from windscreamer or wargs, i have killed him like 40 times and over 1000 wargs and no drop, must be soomething else

I've also killed Windscreamer about 40 times since getting the quest. If the probability of the liver dropping is 1 in 5, the probability of it not dropping 40 times in a row is nearly 1 in 10,000 times. As this has happened to both of us I suspect there may be a "trigger" which stops the liver being dropped under certain circumstances.

For example I had killed Windscreamer a couple of times before getting this quest, and it may have dropped its liver then (I can't remember) - if its programmed to drop only once that would explain it.