I would judge that by the looks of it that this car hasn't moved in awhile and that is why the OP is trying to get the drum freed up. So moving the car back and forth is not an option unless you want him to drag it with a big **** truck.
On the other hand, why would you do a brake job on a car that doesn't run? Oh, and a sure grip won't keep the drum from coming off. The axle and drum will still turn slightly.