I wrote a story about this once! Imagine his reactions to all that had occured and been invented since 1795/96. Hell, the fact that America and England were playing nice by 1967 should have been enough to throw him into total shock!
LOL, Buzz! Yeah, I think the expression on his face would be priceless when he found out England and the U.S. were getting along just fine, (thank you very much), when the last time he knew it, the U.S. had recently gained their independence.
I have to agree with the others about how Barnabas must have been getting his supply of...um...well..blood from somewhere, there were things you know happened on the show that just weren't shown.
There is a great deal of vampire lore, Dracula, and other more recent authors, but IMHO, I think a lot of it is shaped by people's interpretations, and if an author, or person, doesn't like one particular aspect of the vampire lore, then they change it to something more inventive or something more to their liking.
I realize that some things, for example, the cross being a deterrent to vampires is something that is used in DS, but on the other hand, do we really know for certain that Barnabas, or vampires in general must "sleep" in a coffin during the day?
[spoiler]When Barnabas and Vicki were in that car accident just after Vicki's return from 1795, Dr. Lang wants to keep Barnabas in the hospital for observation. Julia tries to convince him to allow her to take Barnabas home, but he refuses. She then insists that all windows, and doors be completely covered so that no amount of sunlight can enter the room. Lang agrees.[/spoiler]
I may not have gotten all the details correct, but the gist of it is, that Barnabas was able to remain out of his coffin as long as no daylight entered the room he was occupying.
It's just something to think about...