Here's a great resource I found with some more info.
http://groups.google.com/group/alt.g...c0d7b4416647cb
This is an archive of the newsgroup alt.games.everquest. It's got stuff going all the way back to 1999 and EQ's beta, which is pretty cool. Very easy to search the group, too, so I would definitely recommend checking this out for future research. The only downside is you need a Google account to log in and view the group - but, honestly, who doesn't have a Google account at this point?
Anyway, the linked thread shows some newbie and veteran troll players discussing Troll's KOS status in parts of Oggok, other cities and other faction concerns. In this thread troll players mention being KOS to an "innkeeper" who yelled something about hating Trolls which is Chef Dooga and/or Clurg. Another player also mentions being able to sell inside and outside of Grobb.
So we know two things:
1.) Clurg, Chef Dooga and anyone on Clurg faction needs to be changed to kill trolls on sight.
2.) Merchants of Oggok faction needs to be changed to indifferent for all trolls.