Not sure of your backing situation, but I have to back into my drive, from the same direction every time, when returning home. This has caused some visible wear to passenger side outside edge of tires, due to backing at a fair angle on concrete, causing scrub on that edge.
I don't think you can get D rated Endurance in your tire size, or like above poster mentioned, that would be my choice. I also agree with above mentioned wt carrying ability of D&E at the same psi. However, for scrub, and heat reasons, if changing to an E-rated tire, I still recommend adding the extra 15 psi to them.
Jerry