Your 02 has ATRAC and is capable of some pretty amazing things without lockers. You just have to get to know the system and learn how to work the throttle to get the most out of it. I’ve wheeled with lots of ATRAC 100s and they can go 95% of where locked 100s go. Also lockers aren’t always the best option over here because of wheel spin in slick off camber situation. A lot of times ATRAC actually works better because it won’t spin you into a rock wall or tree.
My thinking on sliders and skids vs bumpers is that you probably plan on replacing the bumpers in the future so why not wait until you need to when you damage one. What you don’t PLAN on replacing is rocker panels, doors, transmissions, transfer cases, and oil pans, so why not protect them early on to keep that from happening?