Cut their funding . <| sep |> What about doing some sort of a bladder inside a bed toolbox ? You could add a locking fuel cap to the top of the box and have the box itself lock . It ' d give you a ton of extra range and would be very centrally located . If you need to fill up , a quick siphon tube in the fill cap and into the tank and you ' re golden . It might take some home brewed ingenuity and time to refine , but it keeps the vapors out of the cab , is lockable most people probably wouldn ' t even suspect it ' s fuel , doesn ' t permanently modify your rig , is centrally located , and should carry at least one full tank . My only real concern would be how much it could slosh , but if overlanding and not fullon wheeling , I don ' t think it ' d be a major factor .