The only clothing I saw were the Vampire Robes, which aren't actually robes at all.
No, we can't get unenchanted versions of those.
No, we can't smith unenchanted faction armor, but you can buy the Dawnguard Armor off a DG NPC, or find them on dead DG members or scattered across the fort.
Some of the pre-enchanted stuff held a second enchantment also.
That may have been a bug though, not sire.
As for the wild werewolves, I was OP at the point I ran into one and killed it too easily, probably more powerful when you run into them at lower levels