You know, you are absolutely right and I definitely didn't think about that. In fact, I pull in in the Costco parking lot, because that's the one place I really need that trunk access. So great point, absolutely right.
My grocery trips are generally smaller and more frequent, just open the front door, toss things on front seat, and get in the other side.

I'm trying not to hit things, first and foremost, and I think backing in provides as better opportunity for that.