So you're planning on putting lots of these expensive, hardened systems anywhere there 'might' be a disaster? Makes absolutely no sense.
If a disaster is that likely in a given locale, it would make much more sense to build your bunker - and fill it with thousands of pounds of supplies instead of letting your tiny toy copter bring you a couple of cans of beer and some joints. Or do what the Air Force does, put the stuff in pallets, attach a parachute and airlift it to where it's needed.
This is like trying to download Wikipedia on a 300 baud modem line.