TyroneandGladys,
I agree that weight distribution plays a big part in how a rig handles but in this case it has no affect. When towing 4 down (a toad) there is virtually no tongue weight at all. The amount of force it takes to turn the front of the towed vehicle is the major affect that towing a toad has on the rig. The rest is all up to how the rig handles on it's own. The side to side force can cause a tail wagging affect which is exaggerated at the steering wheel. There will be little to no change in the weight distibution with the toad connected If it is on all 4 wheels. How much is loaded to the rear inside the RV will change the front wheel weight ratio though. Which you are absolutely right, can have an adverse affect even with a toad.