Ok, so I"m level 85 and I really want to thrall a Volkihar Vampire but in all the vampire dungeons in the game I only encounter Nightlord vampires and Nightmaster vampires (No Volkihar or even Master Vampires).

I was wondering if there are specific places I can encounter a Volkihar vampire or even places with a chance to find one..

I tried the world encounter in Wayward Pass and a Nightlord vampire spawned there :\

Any help would be much appriciated

Oh and I already finished the Dawnguard questline siding with the Dawnguard.

The Castle, that is about it as far as i know. I do not think Volkihar Vampires are part of the random spawn.

I think its too late now. You're a very high level. I believe Volkihar vampires only appear at around levels 40-50 since Dawnguard introduced new leveled vampires.

Since I finished the Dawnguard questline the castle is empty :\ That a real shame I really liked them as they are the stongest thralls in the game.