https://www.weigh-safe.com/

From Weigh Safe: "Tounge weight should be no less than 10% and no more than 15%" Agreed?

Never needed one of these hitches but I sure wouldn't mind having one.

 

Will shifting that weight rearward reduce the tongue weight to 13% of the total trailer weight?
If a tongue weight that is 13% (or so) of the gross trailer weight does not exceed the rating of the hitch, does it matter where the load is located in relation to the axle(s)?

I think it comes down to this - if the GVW of a loaded trailer does not exceed the tow capacity of the tow vehicle, and if the tongue weight, at 13% (or so) of the GVW of the trailer does not exceed the weight rating of the hitch, suspension or tires of the tow vehicle, and the front bumper of the tow vehicle is not lifted more than an inch or so (totally arbitrary number on my part) by the addition of 13% (or so) of the loaded trailers GVW to the rear of the tow vehicle, one could safely assume such a rig is safe to drive without a WDH.
The specification concerning the front bumper is merely intended to convey that a reasonable person would conclude that there is enough weight remaining on the steer axle to ensure proper tire to road surface contact. How much weight can be removed from the front axle and still safely steer is a subject meriting it's own debate.

Oddly enough, I own a 27 foot travel trailer that I always use the WDH on; I own a boat that is longer and taller than the travel trailer that I have never used a WDH on. Go figure.