My F250 has the camper package, the 10,000 lb. package, and pretty much every package that was available in 2012. However, due to the short blocks, it did sag under light loads. There is a TSB addressing this issue, but to do the swap correctly, you need about $2300.00 in parts according to Ford.
I went with airbags with internal jounce cushions, and now that I have the Curt class V hitch, I can tow anything!
Muhahahaha!!

 

Buy some Timbrens they bolt on top of your axle they hold a whole lot of weight I have some on my 350 you could install them yourself and they are very inexpensive and you don't have to worry about leaking lines or leaking air bags totally reliable