Tempting.  I grew up in the South so I've definitely said my share of Y'alls.  I worked hard to get rid of my southern accent for some reason.  I can't do it at will, but if I hang with southerners (especially Georgians or Texans), it will come back.  I also get a lot of twang when I read Mark Twain out loud.  He writes in southern.  My son used to love having me read Mark Twain out loud.