Rear leveling with adding airbags.

[Jy1]

So I wanted to level the frontend, but have had some questions about doing a reverse level on the rear of the truck.  I want it to sit level by dropping the rear and since i tow an older ski nautique, didn't know if I could lower/level the rear and run airbags to keep it level with a load.  What kind of bags would be the best? Is it even possible? My 2500 duramax is bagged and lifted and is an absolute Sherman tank.