I have a hitch rack with my wagon. It does have to be swung (down) to open the back, and that does get annoying by the end of the summer, especially with hands full. You cannot swing it with bikes on it, only a side-swing is designed for that.
All that said, it's a heck of a lot nicer than dealing with the roof. I was always scared, especially with a fork mount, that I was going to slip and drop the bike and send the bare fork straight through the sun roof.
I'll look up what I have when I get home; I don't have it on the car for the season yet. That happens this weekend *grin*.