Oh, quick tip: Careful on how you destroy the bone totem. Apparently you can one-shot the area with so much damage that the quest doesn't update. First time I did it, all the miners were still enchanted, but the totem was gone. -_-
That's what happened to me. I thought I had missed something else that I'd find later.
So essentially the main quest is broken now? No way to cheat myself past the gate?