Chainsaw, oil, and bits (excluding fuel) is in a 50L black tub with lid in the back of the car ontop of the draw system, behind the cargo barrier. Also has other things like, fuel filters, 1L of car engine oil, 1L brake fluid etc in the same box.
Genie is stored in the camper trailer, box on the drawbar along with the camp oven, dog food, billy etc.
Fuel for both is stored on the camper roof rack in a 10L split jerry can. The straight unleaded in one side, and made up chainsaw fuel in the other side. These days not too often we dont have the camper with the car, but if we do go for a day drive, we fill the chainsaw up before we go, but dont usually take the jerry with us. If we do, it gets strapped on the roof rack. We always have the axe on the car anyways if needs be.