The rear hub & bearing are pre-assembled and get replaced as a single unit. They are about $40 at Advance auto. You'll need a large axle nut socket (32mm?) but can probably skip a puller. I got a loaner puller, but the hub/bearing slipped off pretty easily once the nut was removed. Rears are pretty easy. I have rear disk, but I think the job is about same once you pull the drum.
