I have a tool box on top of my roof rack that holds my chainsaw, oil, fuel, bag of tools, some ropes, in other words, things I do not need to get at that often. It is sealed and works perfectly. It is only a steel tool box, but it is lockable and light. I have it bolted through the bottom and sits behind my second spare wheel, which does not seem to make much difference to fuel economy. I only use a hand file to sharpen the saw. Works just fine and is easy as.
Just one hint! I know some poor fool who went to all of the trouble to carry his chainsaw on a big trip and was just salivating at the thought of heaps of fire wood, except.

This fool did not check before the trip that the chainsaw was in good working order. Well my wife, I mean his wife, just keep saying, ‘Surely you checked it before we left, surely etc etc etc’. Apparently all of the fuel lines were a bit old and just crumpled. To this day I think his wife still says, ‘Have you checked that the chainsaw works this time!’ I think the worst part of that trip was my wife, I mean his wife, having the greatest of pleasure in telling everyone we happen to meet while collecting firewood, ‘Gee, if only we had a chainsaw.’ Then telling the story!
