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. ...
5 pounds will not make much of a difference. You should get the vehicle weighed. What chassis? Are the air bags front or back? Are they factory or after-market?