I doubt anyone here tows with less consideration of ratings than I do (if they do, God help them) but a 16 foot fiberglass i/o V6 could weigh 2300 lb plus a trailer of maybe 750 lb plus some fuel and gear. And the whole set up is twice as long as your YJ more or less, which bothers me more than the 200% over towing limit. I doubt you will enjoy towing that setup other than a short run to the river that runs through your own town. An hour of it would be intolerable. A hour of it on hills would be dangerous and unpleasant.
03 Rubicon; 99 xj with too much stuff to list; Unimog 406