[Fulltiming]

Sounds like your weights are distributed reasonably well. You still have 1582 pounds on the front axle, 3835 pounds on the drive axle and 5129 pounds on the tag. By adding pressure to the tag you will decrease the load on the drive axle and increase the load on the tag and to a much lesser extent the front axle. Your front axle will be the first to hit the GAWR. Your water/wastewater tanks are near the drive axle but your fuel tank will put most of its weight on the front axle. You certainly have a lot of load capacity.

I tried weighing mine at different tag pressures once and on my coach, which is heavier than yours, raising the tag pressure from 25 to 50 psi resulted in an increase in tag weight of about 2700 pounds, a decrease in drive weight of 3150 pounds and an increase in the front axle weight of 450 pounds. My coach was almost full of fuel and had a 1/4 tank of water, 30 gallons of propane and about 2,900 pounds of 'stuff' so I was close to 43,000 pounds and therefore much closer to my GVWR. If yours is similar, increasing the tag pressure to 30 psi should help even out the capacity between the drive and tag axles.