I don't think vee hick ull is an accent or regional thing...
...I think its an affectation. I never heard it when I was a kid, and I was brought up in the rural South (I can still slip into a pretty good redneck when I'm around the right people.) I don't remember when I first noticed it, but it was sometime in the 60s or even later, and it was used by official people, like cops.
While we're on this topic. English suffers from not having a second person plural. In the south this is dealt with by the well known "yawl" and in NYC by "youse". In western PA they say "youns" (pronounced to rhyme with "buns"). As in "Do youns have any gum bands?"