Those offering advice on ferry tanks, get real. If our opening poster is hiring an aircraft, ferry tanks are not an option to him; back to flightsim kiddies.
If that's for me, TurtlePac do collapsible Jerry cans that don't need to be plumbed into the aircraft. Bit pricy though. May be easier, may be more adapted to aircraft use - that's all.
Now, where's my flightsim?