RTCastillo wrote:
And more importantly, since it's new, will it retain the vehicle warranty with the mods?
Not a concern.
OP, conservatively, take whatever the listed payload for the truck is, which is somewhere between 5-6klbs? That is your available payload for a camper.
You may end up supplementing the rear suspension with a sway bar or some sort of load carrying add on if you get one of those 5-6klb campers, but the truck will handle it.
FWIW, "camper packages" are not a differnet truck. At best they have a sway bar or heavier sway bar and possibly stiffer springs, but better springs is highly unlikely in a dually as its already basically rated to max out the rear axle.