There are few Brudvir based duchies in Vornair - The Anemoi, Erzhalden, and my own, Ulvemåne. I don't know the specifics on any "raiding parties", but I would recommend checking out those duchies and the counties/settlements within them to find a group you are looking for :)

^ this is a duchy that goes with the Viking theme and its got wonderful leadership

yo bro im brudvire tryin to do the whole blacksmith thing raiding wanna be in my bloodline