Tire pressures--newbie questions!

It looks like you're really loading that motor home up. I just called my son who is at the warehouse and had him check the sticker in my Coachmen, Mine with full fuel at the factory weighed 9,622#. The sticker also gave corner weights, and with an empty water tank, the left side (where the tank is), weighed 200# more than the right side. The rear on mine when built was 2,950# RR, and 3,080# LR. That's 6,030# compared to your 7,680# loaded weight. You must have some heavy dogs, since there's no real storage space back there. :B
Mine also has 1,720# LF and 1,650# RF, or 3,370# unloaded, other than fuel.