[Baz]

Doing the math you will need 100 gallons of gas each way.

Without knowing the capacity of your vehicle's fuel tank, it's hard to say exactly how much extra gas you would need to tote, to be totally independent of any gas stations along the way.

Of course, I would recommend just winging it - and for safety considerations not taking along any extra gas.

But the caveat to that recommendation is there are ways to toe extra gas safely - so I will leave that exception in place.