I did not start with a 4700 pound camper. Mine started with an empty weight of half that amount and it is still plenty for a 1 ton SRW truck.
If you are going to push the weight a bit, you will need to consider 19.5 wheels and tires, suspension upgrades such as shocks, sway bar, extra spring capacity and perhaps airbags to level the truck.
4700 pound wet weight is not a bit overweight. It is way, way over the capacity of a 1 ton SRW truck. Even if you could make all the upgrades needed to handle the weight, you would not have the braking capacity. It would take you a country miles to slow and stop the rig.