Yes I have! If you want to go that rout go to an RV parts house and get a battery isolator. about $50 bucks. Directions come with the isolator. I had no problems with this product.
Mine was not this kind. but heresthe link.
http://www.wagnerproducts.com/isolator.htm
Mine was this type.
http://www.hellroaring.com/4wheel.php