I do not have the specific make/ model as you, but I have looked very closly at all of my specs, weights, etc... I won't bore you with it since it is too different from your desired set-up, but...
Anytime COG is behind the rear wheel (regardless of how far) it WILL lift SOME weight from the front tires. If you add to this rearwared COG a boat trailer without some sort of WD hitch, the lift at the front will increase more... it is just physics.
I read it as you do not have either truck nor camper... Too bad there is not a way to "test drive" the truck and camper to the scales.
If WC says it is not designed for a Dodge, it is worth listening to them- JMHO.
