Manufacturer Says this is OK

billtex wrote:
Copy/paste from our 06 Chevy Owners manual;

Here is an example of proper truck and camper match:
A. Camper Center of Gravity
B. Recommended Center of Gravity Location Zone
When the truck is used to carry a slide-in camper, the
total cargo load of the truck consists of the
manufacturer’s camper weight figure, the weight of
installed additional camper equipment not included in
the manufacturer’s camper weight figure, the weight of
camper cargo, and the weight of passengers in the
camper. The total cargo load should not exceed
the truck’s cargo weight rating and the camper’s center
of gravity (A) should fall within the truck’s recommended
center of gravity zone (B) when installed.

The "zone" in the picture (could not paste) is the entire wheel well...
Of course, the more mass you can shift toward the front axle the better the vehicle should handle as the majority will be over the rear.
B

It is NOT "the entire wheel well."

There are dimensions on the inside of the glove compartment lid that define the front and back of that zone.

My 2003 Chevy 1500 defines the zone as 0" to 78" measured from one end of the bed or the other. It has a 6-1/2' (78") bed.

IIRC my 2002 Chevy 3500 lists 0" and 96".