I weighed our rig empty removing anything that wasn't bolted down, no people, no fresh or waste water, but it did have a full 55 gallons of fuel and full 40 pounds of propane. It weighed in at 9,920. For the record, we don't have a slide out.
Loaded up during our "heaviest trip" full fresh water, two adults, full fuel, etc, the rig weighed 11480, just 20 pounds shy of the chassis limit.
During that "heavy" trip, our rear axle was officially over-loaded by 420 pounds, and our front axle was under-loaded by 1340 pounds.