I meant your front suspension torsion bars cranked up which I presume they are not. IE you didn't "level" the truck/lift the front by cranking T bars or installing offset keys.
You're just tapped out on suspension and weight IMO and the combo of rear suspension squish and the fact that it looks like you're taking a good amount of weight off the front axle (them old Chebbie duallies don't sit near as high in front as yours looks in the pic).
Plus the front half of your truck is considerably lighter weight than newer rigs, especially diesels. WDH is going to work harder to transfer weight with the handicap you've introduced (long hitch extension).
Most folks with a 11-12' super heavy camper with slideout(s) and a big trailer behind have alot of mods on a newer dually 1 ton or are in the class 4-5 category for trucks.
Only suggestion I can think to improve the visual attitude is add springs in the rear. Not more blocks.