sadly, I read various media reporting the rate of "accidents" with RVs is increasing yearly. All due to driver error and ignorance, unfortunately. so here is my 2 cents.....
Shifting weight rearwards is never a good idea. I see your TV is a 3/4t, so you should be able to place 1k# on the hitch. The key is to place the TT center of mass ahead of the wheels, regardless of any "rules" for tongue weight: the 10% is an indication only.
The reason is physics. For every force in one direction, an equal force is applied in the opposite direction. No problem when everything is perfect and you are driving along on a smooth road, no bumps, no sway, new tires, etc. But nothing is perfect. Forces are 3 dimensional, and rather complicated to do the math.
For 1 dimension, travelling in a straight line, the force of TT sway is estimated by
F = m x L x a x (sine of sway angle)
m = mass
L = length from hitch to center of momentum mass
a = acceleration [or deceleration] [ie the change in velocity]
angle = the amount of sway your TT encounters in 1 second, expressed in degrees.
each of m, L, a, sine will apply a force to your TV. when you multiply all of these together, the force from the TT can be very high, easily 7000 lbf, and this can occur in only 1 second. this means your TV must somehow absorb this in its tires, suspension, frame, lest it lose control. you can offset this force by accelerating your TV, if you have the traction and space ahead. but this occurs after 1 second, as 99.9% of drivers need +1 second to react. for the 1st second, your TV must control/absorb the force caused by TT sway. [this is why I say you can never have enough truck for the job]. [never, ever apply brakes if you encounter sway!]
soooooo, shifting weight rearwards increases L, and the TT's force upon the TV. Increasing the TT weight with water increases its mass, which further increases its force upon the TV. If the force of wind [eg a passing semitrailer] causes you to lose say 10mph, the force increases even more. As the TT angles away from straight line, more force results. all this force can easily multiply and occur in 1 second.
From the above, you may deduce that TV mass is more important than TT mass. Because mass means force: for the TV, more TV mass means greater resistance to the forces from the TT. thus, I ensure extra weight goes firstly into my TV.
soooo, best is to reduce TT weight and ensure the TT centre of momentum lies ahead of its wheels. If ever you encounter dangerous sway, downhill, rainy conditions, to the point you can feel your TV breaking traction, I can guarantee any sane driver will seek ways to avoid this. The key is to comprehend the Forces encountered and balance your gear accordingly.
hope this helps.
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