I drive a 32' Itasca Cambria. I keep the tire pressure at 80 psi and the air bladder bags at 35 psi. When we are driving the RV seems to feel every asphalt repair, expansion joints, road damage, etc. ...
I contacted Continental (the manufacturer of my OE tires) and they said to inflate per the placard in the door jam. They do not publish an inflation chart.