I'm on a new game lvl 5 and dayspring cavern is gone. Before HF you could enter at level one. I wonder if that will some how effect random vamp attacks.
Dawnguard isn't suppose to start until level 10, even before Hearthfire was released.
Also U.S. government is supposed to lower taxes and fix the economy, However before you could still just manually show up to dayspring and start the quest < 10