The nonhuman camp is located in the northeastern corner of the bagna, not far from the Wieża Maga. This is where the Yaevinn and his band of Scoia'tael stage their battle with the Zakon Płonącej Róży in Rozpoznanie bojem.
A haughty Scoia'tael dressed as a huntress in the camp asks Geralt if he knows about feainnewedd, a golden opportunity for Geralt to give her a dressing down for her bigotry ... or not. He can also ask her about it, not that she'll tell him, but she does give him Lara's Gift. If Geralt talks to her again, he can choose to give her the flower, and gets a response that seems to be a dropped plot/translation bug. She will mention "burmarigold", which does not exist in the game and does not result in any journal entries. Strangely, the same conversation can be repeated after resting or leaving and returning to the swamp, and if Geralt chooses the same responses (give her flower, etc), she will tell you about "Zielona pleśń", which also doesn't seem to result in journal entries.
In Act III, the elves have moved on and the camp, now known as the Obóz salamandry, has been taken over by Roland Bleinheim and his band of Salamandra. They are coordinating the fisstech operation with his brother, Gellert, back in the city. They deal with the gathering of dwugrotu, a primary ingredient and he runs the lab in the sewers.