Learning to ride the bike to match your mechanics is the key. Planning ahead and using gravity are two of the tools that help make light work backing big bikes. Using small steps as you move the bike is helpful too - sandy surfaces will not be your friend.

My limitation is that I also have a right knee that is easily injured. As long as I remember the mechanics of the knee and the physics of moving the mass, I seldom find myself in a difficult situation. The couple of times that it a has happened, I ask a stranger if they could give me a push and they happily helped me. I've done the same over the years for a few riders who couldn't quite muster the power to overcome the angle.

-R