[Bozos of Bones]

My main problem is that I've been somewhat less than thorough in my search. I've cleaned out one cave, exited through the other exit and saw another cave entrance for what I thought I've already been to, and that sort of thing. A detailed list of things I've done:
Killed halfling, Neva and Vicodin orc sent after me by the cult. Obtained one word from Vicodin that the cult is in Luskan. Cannot get into Luskan. I've done the werewolf quest, Griffin Inn labirynth, a few caves here and there. Also completed the archeologist dig cave and the Creator's dungeons. Been judge in Charwood village. Healed the Spirit in Neverwinter. I think there's a small thing more, but I think that covers it. Is there anything I'm missing? Most likely I'm just plain stupid walking next to a quest-important door for the 9th time thinking I've been there, but still, I just don't know what to do and what not.