One more thing to think about -
As I stated above, I have a Truxedo roll-up cover. When rolled up, even with the few metal supports, it is very small. I'd guess less then 1/2 half the size of the cover in the ALEXLEBLANC post above. On the couple of times I have sloppily rolled it up so it is larger, I have been unable to see my hitch when backing up to hitch up. Meaning that it's tough to center the truck hitch on the fiver king pin using my inside mirror. That tonneau cover above would be a problem for me, as well as the sectional covers that stack-up right behind the window.
I am a single so I don't have help when hitching. I have a Hensley BD3 hitch.