Quest giver offers a reward in his dialogue, but does not give you any reward upon completion. (Aside from experience of course.)
Presumably he would give some gold, or moose steaks or something.
The archer lads in the quest seem to also drop a invisibility potion every kill, which quickly adds up and might qualify as 'too good to be true'; my party found around 20 in one run.
Need to get bit more information on actual name of this quest, the area and NPC's in question, please.