Vampire Clan HQ Locations:

These are the locations of the Main Haunts for each of the three vamp clans.  If you know what your looking for they're easy to find.  Better yet, you can actually see the locations on the official map so the color coded arrows above point to them.

Ashmalech: (Tomb)(Aundae)  This one couldn't be easier to find.  Its the only tomb on this small island.  Large mushrooms are near the door.  Theres a pathway going through the middle of the isle and the Entrance can be seen from for the path to the west.  

Drushcati: (Dwemer Ruins)(Quarra)  Another easy to find location not far from the Ashmalech Hideout.  This clan has taken over some old dwemer ruins up in the mountain north of Maar Gon.  The entrance to the ruins can be accessed from the east.

Galom Daeus: (Dwemer Ruins)(Berne)  More overun Dwemer Ruins mark this clans HQ.  The Berne have taken up hold in an old Dwemer Observatory on the far removed from the other clans (and much of everything else, making this the most out of reach and hardest to get to of the Clan Haunts).  Its near a river of lava and the rope bridge to cross the river is located south west of the ruins.

Vampire Locations for Starter Players:

These are tombs housing vamps accessible to low level characters

Reloth Tomb: (Berne) This tomb is NorthEast of Gnisis and due West of Maar Gan.  Inbetween this tomb and Maar Gan lies a some Draedic Ruins.  The tomb's entrance faces to the north and is set into a small rock.  This tomb can be hard to miss so look carefully for it.  Of the Tombs listed this is the one that you will most likely become infected.  In fact, at the other tombs (which house weaker vampires) I stood in each of the other tombs for at least an hour letting the vampires wail on me with no avail.  This is also the tomb that you will need to be prepared the most to enter.  Unlike the other 3, this one is not only vampires.  You must go through approximately three Bonelord, two skeletons, and one greater bonewalker prior to getting to the vampire(s).  Come with plenty of healing potions to keep you alive when you get to the vamp (which will be in a room with with "cattle" who are the vampire's slave/food source).  Just let the vampire hit you repeatedly, you just concentrate on keeping yourself alive by healing.  (I tried it multiple times to make sure I didn't just get lucky on this vamp, which has a name btw.  And it never took more than 5 minutes, usually under 1.) You will get a message saying, "You have contracted  Polyphoric Hemophillia".  It will be listed as a benificial benifit at the top of the screen (the blue icon for restore fatigue is it).  Another note, you may want to get the dispel spell or abunch of restore ability potions and a cure blight disease potion or two because the bonelords and bonewalker can infect you with all kinds of nasties and it can be hard to get help removing them after your turned.