How do you know the truck will need any suspension help.
Makes no cents/sense to spend bucks on suspension help if the truck won't need it.
I always load the truck and trailer and make a short trip and then make my decision on suspension help is needed. You can always add your aftermarket suspension choice any time down the road.
My son has a 2015 2500 Chevy Z71 Dmax/A and pulls a 34' BH 5th wheel trailer with no sag and no suspension help.
I wouldn't respond to weight cop comments as they will hijack your question and get your thread closed.