New guy here but...
I have the 8' NCO recently purchased. Installed on a 96 Dodge Dually.
I have plywood between the camper and the truck bed. I am thinking that I would raise up the back of the camper then slide in two 1k capacity furniture dolly's under the middle of the camper lower the camper on to the dollys. Then roll the center of the camper out to the tailgate and then lift it again with the jacks in the middle of the camper and drive the truck out. Probably not as safe as using four jacks but, a set of jacks costs as much as I paid for the camper.