I'm currently breastfeeding. Can I leave go to my car, pump, and come back in? Or is there a place I can plug and pump inside?

They will let you go to your car and back

I pumped there before. I never saw a rule against it. I sat on the floor in the women's locker room near an outlet and did my thing. That was a couple of years ago but it didn't seem to be an issue. I was out of the way.

You should call them because it's against Their rules.