I've had the "bumping into walls" thing in lucid dreams. Not necessarily walls. Haven't figured out how to deal with it yet. It may simply be that "you" don't have control over every aspect of your brain.
Interesting dream. I don't think I've ever had a vampire one. Though I have had some pretty dark ones, like finding a corpse and bringing it back to life. And a really weird Halloween themed one the other night, with this bizarre background music with repeating lyrics going "Krishna is dead."
I definitely don't have control over every aspect of my brain. I often have lucid dreams that seem to be a power struggle between "me" and "my subconscious." My dream characters will sometimes roll their eyes at me as if I have no idea how to properly behave in their realm. I can't argue with that, but it does get weird and slippery when I try to identify what is "me," what is "my subconscious," and what is a "dream character."
Your dreams sound fascinating. I've had corpses in dreams but never brought one to life. Did you post some of your dreams a long time ago? I seem to remember reading a few and thinking they were pretty mind-blowing.