The only weight police that will care are on forums like this. You won't be violating any laws with that camper on that truck.
I feel certain it would handle it fine. You might have to add air bags, HD shocks, maybe a stiff(er) sway bar, and E rated tires if you don't already have them.
I don't think a single person, particularly a male, would load an 8' TC with 1,000 pounds of water, food, and gear. If you were taking a wife and kids then that would be likely. I suspect you might only add 500 to 700 pounds of stuff. The majority of people hauling TC, particularly on older trucks like that are loaded over their GVWR. My own '05 dually is about 1,700 pounds over ready to camp.