Re: Some missing quests
Andreg's quest in Gravenwood do not gate the Heathfells quests, so that's not the reason you can't find them. The first two quests in the Heathfells are given to you in Forthbrond. Do every quest in those chains, because only a few quests at a time will open. If you have any open quests, you must complete them.
The quests in the Pit of Iron are gated by Collapsing the Cave and the Battle of Dol Baran instance (the last of the Dol Baran quests). You must complete both in order for the Pit of Iron quests to open. Both of these are at the end of quest chains, so again - don't leave anything uncompleted.
[i][color=#dbb953]"Yet there may be a light beyond the darkness; and if so, I would have you see it and be glad."[/color][/i]