Expect to upgrade to 19.5" wheels to get sufficient rear axle capacity for your camper and trailer tongue weight. The truck will need at least StableLoads, bags, shocks and stabilizer bars to upgrade the suspension. Towing will require a SuperHitch, SuperTruss and weight distribution hitch.
Been using here and done that for 30k miles on my Ford F250 carrying an Arctic Fox 811 while towing an 8k lb 20' enclosed trailer.
In your case without the camper package, I would go to F550 rear spring pack and stabilizer bar before trying to aid your stock suspension.