Thanks for the research, Incognito. I think somewhere along the line a simple fence became a "wall" in the retelling.
Crazy Sounding Story
They are also in the process of building a 'special wall' around the entire property to 'keep snakes out'."
Imagine that.........Jehovah's Witnesses building a wall to keep unwelcome visitors out. LOL
This newspaper article from July 2013 ( http://www.recordonline.com/apps/pbcs.dll/article?AID=/20130719/BIZ/307190342 ) states that rattlesnake dens are located less than 1 mile away from the WT property.
Offspring of vipers???????