The CargoLifter-Conendrum:
If you're want to use your cargo airship for point to point transport, you'll need ballast at the target point so that the buoyancy of the airship doesn’t change too much. CargoLifter back then used water. Their prototype could lift an armoured vehicle and lower it – while maintaining buoyancy through pumping water with an high speed pump. They planned cargo services for very remote points.
But if you’ll can transport water and a high speed pump and a mobile mooring tower to the very remote target, chances are, you’ll already can transport the cargo itself to that target.
Today the CargoLifter hangar is the biggest indoor water park.