Describing a design in words can be wild!
You drew a design once with a tongue box to support a light weight tongue. There was just the side view. Just imagine that being a flat panel rather than a box.
That panel, 1 or 2" thick, would attatch to the top of the tongue, going almost to the metal hitch, with the other end would be scribed to fit the front contour of the tear, and bolted to the front horizontal ribs, which will be reinforced.
Two similar, but smaller horizontal panels, attatched to the tongue on one end and to the pan on the other, will stabliize the horizontal movement of the tongue.
The double braces that were used on the vintage wood trailer would work fine, but joining the braces to the tongue and the body would be harder with wood than with pipe, and I want to use wood.
My tongue is quite short, about 26" from the base of the tear. I know how to back carefully, and as light as it is, I could unhitch the trailer and push it back, by hand, if necessary.
Thanks for your guidance.