Try this: position your self on the same side of the road as your site. Pull forward enough so the rear end of the 5er is 5 ft or so past the site ( different sites may need more or less ) and just before stopping turn theTV in the direction of the site so the TV and 5er are not lined up any more. A 5er wants to stay straight behind the TV, that is why they are so stable when towing. Because of this they take more distance and steering input to st:art to turn when backing and when they finally do turn you have way too much steering in. By breaking the straight line while still moving forward you will have the rear of the 5er pointed at the site and will need less steering input to start the swing of the 5er into the site. Then it is a matter of small correction similar to what you are used to doing.