QUOTE(Winter Wolf @ Dec 24 2015, 11:42 PM)

In the four years since starting Skyrim I have never progressed far enough to have either dragon or vampire attacks in towns (Dawnguard has never sat on my hard drive). I have decided to 'allow' these moments into my game for the first time on my new character. I hope I do not regret the decision.
I came to love the Oblivion gates opening, but these attacks, I am not sure.
I read something about avoiding fast travel. Or at least setting up the stables as the point.
Correct, you'll want to avoid fast travel. FT (including travel by horse-carts) can trigger some attacks.
The vampire attacks aren't so bad, matter of fact I welcomed them when I was gaming on Xbox, because they happen randomly, whereas so many encounters in Skyrim's base game are static, which gets old. I like the surprises Dawnguard adds.
On the other hand, once you start DG, you'll want to keep it moving during early stages. The worst thing about the vamp attacks is they can sometimes make their way into towns, or around stable areas. Named NPCs can sometimes get killed.

But if you keep the questline moving, in-town vampire attacks will eventually stop. Only the wilderness ones will continue.
Dragon attacks are annoying to me, but some folks don't mind them. If you're playing the vanilla game, dragons will show up every 3 days or so. Nothing we can do about this. Bethesda set it up this way so we can b3@t da game with our t00n, collecting all the Shouts in as short a time as possible. But to me, fighting dragons should be special and rare.