Need help with self hitch & ball aligning.

For times that I travel alone I need an accessory that will
help with aligning the ball and hitch efficiently without damaging the rear bumper. A product call 'Hitch n Mirror' looks like a promising product. There is another product called an 'EZ-Guide Hitch Tool' that helps guide the hitch to the ball and offers some protection for the bumper. If you have had experience using one of these products or some other product that you thought worked well, or have any other suggestions, please reply? Any input would be appreciated.