Right now I use a small / cheap folding camp table that butts up against the bumper. the table fits wash and rinse tubs and a dish drying rack. It is a bit flimsy and too far from the shower spigot.
If I can get closer to the trailer and maybe just a bit longer, life would be that much better.
I plan to add a towel drying rack to the ladder with a hook for a lantern. I thought about installed lights back there, but would be cheaper with an LED lantern.
as for cooking, I built a stand alone kitchen box to complement my 3-burner coleman stove. check out my mods.
A man always needs a project!