Upgrading Ram suspension for TC

I have the 2016 3500 w/cummins and air bags. They don't lift the camper or truck mt. I never run with them mt but about min of 5#. This is recommended to help keep there shape. Normally I just leave them at the pressure I was using, around 50#. I had to add them for the same reason, I was squatting in the rear. Thought about the compressor but didn't want the extra expense. They have been no problem with 50-60# when I'm mt. I put the fill connectors in the back of the fuel fill compartment. Makes it easy to get to air up or down. Can't remember what brand I'm using but they are basicly all the same.