Not sure what you mean by a roof top tent?
But I had a ladder rack like the one in the second picture down in this thread: Let's see pics of your camping / or exploring rigs!
It was bolted down to bed, but upright posts were outside of bed so I could have a hard canopy or remove it, just slid it in and out.
I am sure a soft top would do fine with that.
Also the overcab adds alot more carrying capacity