[BiggarView]

The placard on the driver side front of your RV will spell out your GVWR, your Cargo Carrying Capacity and the weight of full fresh water which most times is assumed to be carried on board. If you add the CCC number and the weight of the water, you get the total carrying capacity of your RV.

There is no requirement to travel with full water... weight is weight no matter what it consists of.

Where you place it (weight) in your rig does matter though. Fresh water tanks are typically over the axles. Carrying less water and more gear and loading up the front of your RV could present loading issues on the pin, towing vehicle rear axle and drivability.

We rarely carry tank fresh water (except the hot water heater) on moving day unless we are headed into boondocking locations or overnights where hooking up water and sewer is less than desirable and on board water will suffice for a day or two. YMMV as they say.