[dredmorbius]

I see the major advantage in being shuttling between a field (or port) in which conventional transport can be utilized, and a specific disaster locale in where you cannot land a 747, C130, or dock a PANAMAX ship. Utilize those for the long-haul, then use the airship to shuttle between your full-service port and the specific locations which are cut off.

When you're talking about the difference between getting supplies to a region that's cut off from the rest of the world, even a 10km or 100km haul can be hugely useful, and the airship can cover that distance in 6 - 60 minutes.