Brian's correct - you need to adjust your tire pressures based on the load each axle's carrying and the tire manufacturer's inflation table for your tire size and load range. As an example, the 4106 I recently owned weighed just over 20K stripped. Doing the research gave me 80 psi front, 70 psi rear.
When you weigh your coach, you should do so in "ready to roll" trim, thus a full fuel tank, a full freshwater tank, all of Mama's stuff inside, food, groceries, etc.
Rolling across the scales, you should get a front axle weight, three axle weight (whole coach), two axle weight and last(tag) axle weight. A little math will help you determine the drive axle weight, at least close enough for these purposes.
Once you have each axle's weight, divide that by the number of tires on each axle, in your case by 2, 4 & 4 (since you've got duals on the tags). That will give you the average weight each tire's carrying. I take that number and add 200 lbs as a fudge factor, then go to the inflation tables to find the corresponding pressure. If the weight falls inbetween, use the higher psi.
FWIW & HTH. . .