Bea, I remember your original post and I'm glad you've got your coach settled in. If you weighed it, consulted a load/pressure chart, and adjusted pressure accordingly (taking into account that Single and Dual have different charted numbers)... Then your tire pressures are correct.
Harvard will likely look at this and be glad you had the Caster set higher.
CG, the tire sidewalls, and the sticker Ford/GM or the coach builder put in the door jamb are no help till we know the load on the tires. If you have a 32 with a long wheelbase, chances are that your front axle is close to max rating (GAWR). It's hard to get much weight onto the front axle of shorter Class C's. If their tire pressure isn't set to the actual weight, but to sidewall or sticker numbers, the tires' contact patch with the road becomes so small that it isn't enough to properly steer or track. Steering is touchy and it wanders.
I know from memory that with 225/75R16E like most of us have, 65 is full GAWR (4600) for E-Series up to 2007 and 80 for the full GAWR (5000) for 2008 and newer. Entirely possible to need all 80 in the rears of the larger Class C's. Some have so much rear overhang that they're at or over GAWR Rear. More pressure in rears than what's actually required by weight doesn't affect steering/tracking. And probably not ride, either. Already terrible back there...
