I'm not sure if this is of help or not but for what it's worth...
I am not a skilled biker (or photographer as you can see) but I did want a cheap/easy way to attach my Trek bike to the back of the SMB & still be able to open the door. This ladder mount bike rack (39 bucks from Target - so I can drive an SMB and pretend I'm tight with my money)
It's a cinch to attach. I can open and close the door. It will hold 2 bikes. Only catch, I have to put something over the handle bar to keep it from rubbing on the bumper when I open the door. (I use 2 socks - cause it's such a classy look.)
This allows me to keep my hitch step in place. Plus, my hope is this leaves me free to also use a trailer hitch box at the same time (if I ever get one.)