Help with Gnoll Fangs Quest and Faction

[CptnCanuck]

Hello Everyone, looking for some help with an issue I am having with the Gnoll Fang Quests and faction.

I recently created a Half-Elf rogue (Agnostic) and started her in Qeynos. I have been killing Gnolls and getting fangs and I turned a bunch in Qeynos. Then I noticed turning them in lowers my faction with the rogue guild. I assume I shouldn't continue turning in the fangs in Qeynos as being a rogue I don't want to lower my faction with the rogue guild so I decided to head to Halas. When I got close to Halas I was actually smart and conned one of the guards and it said he regarded me threatening so I turned around right away.

So now I am not sure how to proceed with the gnoll quest. It's good xp for my lvl 8 rogue and would like to continue doing the quest for her but not sure if I can or should.
I did some reading in the forums and it sounds like it isn't easy to build up faction with Halas, especially for a lvl 8 rogue. So I am wondering if it is really worth trying to go this route?
The other question would be if I continued turning the quest in Qeynos will I still be ok with the rogue guild as it would require an insane amount of turn-ins to make them hate me? or I shouldn't turn the fangs in there anymore?

Any help would be much appreciated as I would still like to get the xp from this quest but if I need to drop it I will and move on someplace else.