I made a trailer that works for me and my needs, I started with a trailer I got from an old ranch wife.
It started life as a 40's pick-up bed that had a home made axle on it. I made a new tongue, put a 2 5/16 bulldog coupler on it and redid the forward part of the frame. I added 4 places outside the trailer body to tie down gas/water cans and 20# propane tanks and a 10 gal Igloo water cooler. The tongue has a large water proof tool box for tie downs, flashlight, flares, the Willys has a Hi-Lift jack the trailer has a 8 ton bottle jack in the tool box.
It's got a 3500# axle with brakes and 5 on 5 1/2 lug pattern so it shares the same pattern as my Willys, so I have 2 spares when I'm out hunting, camping or just 4 wheeling. It has a 2500# winch and dedicated battery to run it and the work lights so I can load stuff (dead elk, deer) about 30 tie downs, 16" of clearance at the low point so if the Willys fits the trailer will too. I also use it to haul water with a 300 gal tank. The bed is 52" X 102" so you can get a lot of stuff in it.
I have 2 LED stop/turn/tail and 4 LED marker lights so some dumb ass doesn't hit me because he didn't see me. I added 2 lights on the front of the bed that swivel to help load and unload, a light under the winch mount so I can see in the tool box, back up lights in the rear with 2 under the bed at 45* so they shine out so you can see where you're backing up into and one under the tongue so you can hook and unhook easier in the dark (there is a switch on the trailer so you can use all the lights while it's unhooked.
Stuff that's always in the trailer, flares, a dedicated 4 way lug wrench ( welded a bead on the one that fits the trailer, it's also bright pink for day time), 2 Maglights w/ fresh batteries, 8 ton jack
and handle, 12-20 tie ratchet straps, spare pin for hitch, 5 lug nuts (fits the Willys and trailer).
I get used to the question "why do you have
all those lights"? I spend a lot of time outside and half of that is in the dark. I hate not being able to see what I'm backing up into or where that tree went. Being a one legged guy I like being able to turn all the trailer lights on and walk around without tripping over something.
SO that's why I have a lot of lights, try it you're never go back to the dark side.
I'm getting close to painting it to match my Willys. I think in addition to being useful as hell it looks good rolling down the road.