If you come in through the main bridge at the bottom- through all the traps/poison- you can talk to the guards as Ifan and they will be deferential and let you right in. Then everyone is yellow and you can even trade with the potion maker and fletcher before you start the quest with Roost.
However: [spoiler] be ready to fight once you kill Roost. I found that if you go out the left door, toward the fletcher, you will only agro the NPCs on that end and when you kill them you can rest up before fighting the ones on the right. If you go out the front door you pull everyone at the same time.
[/spoiler].
Last edited by ceruleanspiral; 28/09/17 02:57 AM.