The trigger is Zevlor.
Specifically the "Lets go to my camp" option. Where it will take you to the camp with the party going on.
Simply going to camp yourself, doesn't work. You have to use Zevlor's dialogue option.
You can delay it from when he auto-engages dialogue when returning to the Grove if you want to do some other things (Such as talking to Halsin) but you need to go back to Zevlor and use his dialogue to initiate the party.
Last edited by Taril; 55 minutes ago.
