Has anyone done such a thing? Even though 4000 pounds will crush a half-ton truck if plopped on the bed, even adding a ton for the trailer is still within tow capacity.
Very common around here and has been since truck campers hit the streets in the late '50s/early '60s.
Car haulers/utility trailers usually come 7k gvwr with tandem 3500 lb axles with 15" D tires. The ones I've had weighed in the 1800 lb range leaving it with a around 5200 lb payload. Now subtract the 4000 lb camper leaves you with 1200 lb for more junk.
Next size up is a 10k gvwr with 5200 lb axles with 16" E tires. My 10k gvwr 18' car hauler weighs 2480 lb leaving it with a 7500 lb payload.
We have pipe top trailers....angle iron top trailers and flat deck car haulers types.
Make sure whatever trailer you choose it has plenty of reserve capacity for the trailers axle/tire/wheel capacities.
