More ideas for G’Henna

My party is about to enter G’Henna and I’m looking to see if anyone has run anything other than Circle of Darkness or PhDnD’s adventures? I’m reading the two Quoth the Raven entries, but would like some ideas to flesh the land out a bit more.

The only big difference I have to far is that Yagno had stolen one of the Wizard of Wine gems referenced in Curse of Strahd, allowing him to just make bitter grapes suitable for wine which he hoards for himself and his clergy.

I’m planning on using Immortan Joe’s oasis from Mad Max Fury Road as the idea for this oasis with wine. He sits high above his starving people and releases wine and dried out grapes to the people at certain times.