Dear PeterR
I'm aware of the commercial HF service in Australia which is why I see the commercial route as being the way of creating a nationally coherent "Wilderness Personal Radio Service" where people can hire the service and/or hardware as required at a fraction of the price of satellite comms.
Something that NZ has realised is that HF radio does not need power it needs brains. You do not need a 100W radio and a vehicle to charge the battery, you can use a 4W radio and carry it in your pack (750g about 1.6Lb).
I can steer you towards several portable HF radios but not combined with MF below 2MHz.
Yrs aye
Matthew