Candaith is the quest-giver, and he is NE of Forsaken Inn and slightly NW of Weathertop. At the picture below he is standing at about the northern flag on the western side of Weathertop (co-ordianates S30.1, W37.9).
The chain to the instance quest "Retake Weathertop" can be begun at level 15, but I guess it may *slightly* hard to complete solo below 20 (there are, or at least were back in them olden days, several mobs above level 20 that needs to be killed during the chain, and if I remember right Warmaster Uzorr is/was an elite with several bodyguards). The quest chain:
Rise of the Orcs
An Orc Messenger
Orc-thieves
Warmaster Uzorr
Light in the Darkness
Lost in Interpretation
Lore-Master In Brown
Retake Weathertop
Instance: Retake Weathertop
I'll try to get the quest chain done on Wednesday evening. I *think* I should be able to solo the chain (especially if Uzorr is nerfed these days like most hard mobs seem to be
), but if somebody else is around then, please do join the fray