May have to start ringing some law enforcement down that way to get a correct answer... was looking into it here in Ga wound up with the official answer of "there is nothing that says it's legal, but at same time there is nothing that says its illegal"
Been a while but when I was looking into towing my motorcycle behind my 5er I ran across this kind of attachment that was legal as it was rigid (mounts into the receiver)and just had a dolly wheel on it. Not the one I found back then but it gives you an idea. Kinda pricey and I was going to build my own but sold my bike before I got around to it. https://www.cruiserlifts.com/products/mini-golf-cart