There are no standalone quest givers in Duillond, so if coming from Thorin's hall/Gondamon side, OP just lacks prerequisites fulfilled.
The Gazebo quest giver gets sent to from the Ship-watching terace quest giver. Bregan has prereq of doing some part of elven prologue quest chain. Even Pengrail has a prereq quest chain at the Thrasi lodge. And of course epic prologue has its own chain.
The solution is to go to Celondim and do all quest there. Lots of these will finally send you back to Duillond.
Thank you, Turbine, for listening and giving us an opt-out of FE! Good work!