Now on my current play through on the "Find the shipment" almost all died except for 2 of the party members Tav and Shadowheart. Now I have this chest which I know nothing about and can't find out about it as the ones that are carrying it are also dead. I even tried to use the "Speak with dead" amulet and couldn't use it on any of those that were in that party.
Now this sucks because if I want to find out where to take the chest I would have to load an early save before those that were carrying the chest all died. Now Why didn't they add the ability to use speak with dead on the leader so that we could find out where the chest needed to go without having to load an earlier save or open the chest to complete the quest.
1. This should really be in Hints, tips and tricks section
2. Don't open the chest
3. If you can't talk to Rugan then you are going to have a rough time of this quest. I am gonna be honest, letting Rugan die was a huge mistake (did you tell The Flind to go feast on the meat inside the cave or just attack them outright when they wouldn't give you the chest?)
4. I would go back to before the Gnoll fight and before you killed Rugan and replay that bit - as it's otherwise unlikely you will find the Zhentarim hideout , much less manage to get inside - unless I tell you where and how and even then you will need to pass a lot of rolls.
5. or you can say screw it - open the chest and throw the contents in the next hard fight you get into, or village, druid grove or shattered sanctum. Just make sure lots of people are around, it's a real Eye-opener what happens. Muahaha
BUT if you manage to get into the Zhentarim hideout AND return the chest unopened to the Zhents you get access to
Studded Leather Armor +1, and the Giantbreaker Crossbow. There is also another way to get into the underdark from there.
And if you are REALLY EVIL-
You can intimidate Rugan into giving you the chest once you get the passcode and the location of the Zhent hideout and then you can take the chest (unopened) back there and they will be torturing Rugan, pass a speech check and agree to finish off Rugan and you will get access to the really good item from the shopkeeper
AND you will be entrusted with the chest and be friends with the Zhents. So triple win!