FWIW, the way I did it in the past was pull it out till one of the drums could be laid on the ground and the other was on the tail gate. Then you can either lift the other drum while someone drives the truck out from under it, or you can have another person help you lift the other drum off the tail gate and set it down. Either way, you use two people, but it's pretty manageable. And, you should be having a second person helping you set it down in all situations so you don't mess up your back in case you aren't using proper lifting form.