Depending on the injury/surgery I too had a total hip done at the VA on base, I used a gun runner fanny pack or a shoulder rig

Typically it is officer discretion

pulled over once, informed the officer immediately I was carrying. he made me clear my weapon and place it on the back seat, which I complied with. I have found that as long as youre honest and upfront, and communicate what youre doing before you do, it goes VERY smoothly more often than not

I push the holster down between the center console and the seat right next to the buckle release and my 1911 is condition orange