Stall mat or rubber bed mat, necessity almost on a steel bed.
Presume your flatbed has continuous tie down rails or similar so you can anchor the camper as needed?
Some sort of spring loaded device on tie downs? Maybe not 100% necessary for a short trip home, but you may over stress the tie downs on the camper if you lash it down hard.
Does the camper have dually extensions on the front jacks? Are they wide enough to clear your flatbed?
Is the camper longer than the flatbed or do you have rear swing out dually jack mounts for the rear as well on the camper?
Do you have a way to block the front of the camper, aft, if cannot load it all the way forward (note, you were not specific about the dimensions or style of your flatbed at all)?
Will the camper clear the truck roof? (Again, don't know anything about the truck bed)
Will the camper get up high enough to get onto the flatbed? Got blocks and/or a way to shore the camper up if you need to block it up?
Light plug extension or plans for hooking up lights?
Since you also don't mention the model or height of camper and model of truck, know that you could be approaching 13' tall with your combo.
That's about it for the minimum to get it on your truck and down the road safely.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold