Can't find Gadhup or Brullug anywhere! :/

[PrplGrl]

I'm pretty certain this quest is bugged for me, it's really frustrating....I have a quest that I got from Thorin's Hall called 'Defeat the Cavern Horrors,' where I have to either defeat Gadhup (troll) or Brullug (drake) in a massive cave area called Sarnur. I had to look it up, where these guys supposedly are, and they're supposed to be in the Sarnur Caverns, an area within in Sarnur. I have searched the whole cavern from top to bottom for hours and hours, every inch of it, including in the areas where the wiki said these bosses were, but nothing :( It says Gadhup OR Brullug for the requirement, so I only need to kill one of them, but both of them aren't even here. Has anyone else experienced this problem???

[Xalaron]

I know alot of named enemies in Sarnur are rarespawns and have very long respawn timers. It could be that someone had recently killed them and may be hours before they respawn sadly.

[cheshirm]

servers reset daily at 3am eastern us. try again after reset.

ask a hunter with the passage of foes skill to tag along.

use a tracking tome box or tome of tracking

very old thread - might help:
https://forums.lotro.com/forums/showthread.php?410539-How-do-you-get-the-Sarnur-Bosses-to-spawn