Documents are attached. See the remarks I made recently in the post Headlight Washer does not retract - Includes TB 92-05-01 about front bumper cover removal. The same comments apply to rear bumper cover removal.
I don't think you need any specialized tools such as a 18 inch long screwdriver to get the rear bumper cover off, but I do recall that it is finicky work to get at the bolts that are near the two outboard rear lamp assemblies. I believe that you can get the rear bumper cover off without having to remove either of the two batteries if you have a very complete selection of socket wrench tools (extension shafts, universal joints, thumb turns, etc.), but if you are working with just basic tools, you might have to remove one or both batteries to get access to the fasteners that hold the rear bumper cover in place.