Another way to get to the hideout, if you save the people being attacked by the Gnolls, who are in the Cave, they tell you where to go and give you a pass phrase to use in dialogue with the guy in that room that grants you entry to the hideout.
You don't have to save them to get the pass phrase. You can have tell the gnoll boss to take out the survivors, and while they are busy with that just pick off the gnolls from behind. Afterward, talk with the dead Rugan and Olly, and they will tell you where to go and the pass phrase.
As long as you are not the one to kill them, they will talk to you.
