I had 27 foot goose neck with a 2 5/16 ball. I had a ball welded to the top of the post of a 3 point hay bale spike. I was able to pull the trailer with my cab TL80A. The only problem was the trailer had a deck over the neck so it limited how sharp I could turn. Used it in parades and as a hay ride for several occasions. 40-50 people with no problems. I would wrap x-mas lights around the trailer on the railings and with no brakes. I covered the spike with a piece of PVC to keep from stabbing someone, it also keep people from walking between the tractor and the trailer.
I see no reason the 5th wheel hitch would not work as well.