Our previous 5w required airbags, and rather than having a system with a pump, we purchased one without. The driver and passenger side are independent. Unfortunately, I cannot tell you what pressure "you" should have, but a level tow vehicle is important, so adjust accordingly.
Headlights that shine toward the moon and the ability to see over the hood may be annoying and dangerous.
Furthermore, unequal pressures on your tires will cause problems.
With this RV, we use 15-20 pounds rather than 35 # on the other unit (dependent on the tow of course).