I have ordered two conveyer rollers: (Working load 265 lbs. each)
https://www.grainger.com/product/ASHLAND-CONVEYOR-Galv-Replacement-Roller-24K721
I'm not paying shipping as there is a Grainger in town. My trailer is 8' wide and the rollers are 46" wide.
I am going to mount four eye bolts on the end of the trailer: (Working load 300 lbs. each)
https://www.lowes.com/pd/National-H...ed-Steel-Plain-Eye-Bolt-with-Hex-Nut/50237227
The ends (or maybe only one end) of the rollers are spring loaded so they can be removed for transport/storage/submersion. The 7/16" hex shaft may rotate in the 1/2" eye bolt, so I will just add zip ties to prevent that.
I haven't tried any of this yet but I will add to this thread once I am done.