About a week ahead of time start spraying the 8 bolts that hold the bumper on with powerblaster.
step 1 remove the end caps. This also includes one bolt that attaches them to the rear fender flare... 1/4" socket set for this one.
step 2 cut the snot out of you hands removing the 8 bolts, they are inside the bumper, you might want to consider getting a box ratchet.
Remove bumper.
I did mine the easy way, drill 8 holes in the face of the bumper on my 98 [black], put a socket on each bolt and went in thru the holes with a socket extension, that was after 2 hours of cutting the snot out of my hands. Used plastic plugs to fill the holes if I ever needed it again but I gave it to a neighbor who needed a rear bumper.
Replaced stock bumper with tomken w/2" receiver hitch built in.
Reassemble in reverse order putting plenty of anti-seize on all bolts and nuts which is standard for ANY bolts and nuts you remove on a jeep...