Did the camp as well with the help of a high level necro.
Once you go in the castle, go straight in, under the little ledge and into the room that dips down a bit with some pianos in it.
The gypsies you want turn into werewolves at night.
Be careful as a level 40 they were all DarkBlue to me and a couple of the Thought Sappers (or something like that) see invis.
Good luck.
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