Our '03 Winnebago Ultimate Advantage 40e with Spartan chassis stated CCC is 3,270lb. That includes 4 skinny people at 154lb each, 109 gallon of water (905 lb), 110 gallon of diesel fuel, 37 gallon of LP. We normally travel with only two people and 50 gallon or less of water and waste tanks nearly empty. According to the sheet, we also have 582 lb of dealer installed options.
We have had a four wheel loaded weight done twice (about 2 years apart), and are due another. The first time was before we began fulltiming, and the rig was 1,000 lb heavier with fulltiming load compared to part-timing load. Our left front is always heavier than right front, and right rear heavier than left rear. I count that due to large slide toward left front, and bedroom slide, 5 batteries and basement ac at right rear. We attempt to load cargo accordingly, though there isn't much we can do on the rear to off-balance things. The last time we were weighed we had more fresh water than normal, apx 70 gal, and were 500 lb under the 32,000 GVWR, and a couple hundred lb over weight on the right rear (about the only adjustment we could figure out to affect the rear balance was to carry less fresh water ...not likely to affect balance, but would reduce overall weight). The left front was a couple hundred lbs heavier than the right front, but still under max weight. (put the driver on a diet???). Our load range H tires have more weight capacity than our axles do, so based on the last weigh-in I run them at the recommended pressure for max GVWR, which is still under their max pressures by 10(front) to 15(rear) psi. After the last weigh-in, we lightened the load a bit by removing items we were hauling around but had not used, but have not had a chance to get another four wheel weight.