This creative trailer looks to be the rears of two early CJ-5 tubs welder together, both with tailgates at both the front and back, capped with a Koenig hardtop, plus some additional customization. Looks like it does the job.

https://seattle.craigslist.org/kit/bar/d/kittitas-willys-jeep-and-trailer/7109047016.html

“1955 W38A-1 willys Jeep, Gm 3.8 V6 motor, 4 speed twin stick, wagoneer running gear, Dana 44’s locked, waren winch, compresser, power steering, tilt wheel and more…..title in hand drive it away. trade for your ????? or $ 4500, Worth taking a look at .. I don’t need any cars or bikes ,would consider any farm stuff ATV SUV Utv something fun.”