In my experience the air bags only leveled the ride...
no difference in loaded comfort...
and rougher when unloaded, even with only 3 psi in the bags...
YRMV
I'd say go to the cat scales and weigh everything with and without the rv...
then figure out the MINIMUM air pressure you can run in your tires for the load they need to carry...
If your truck tires say 3090 @ 80 psi...
why run them @ 80 psi if you are only carrying 2000 lbs per tire ?
go to the mfg website and find out the load at each 5 psi increment...
maybe 70 psi will do it - only soften the tire if you've done your homework though - good luck !