I'd suggest trying it & find out what happens. I run 60 to 65 in the fronts and 65 - 70 in the rear, where the inflation charts suggest 55 for my weights.
If it wanders too much, it's easy to pull over and shed some PSI.
I started out running 80 all the way around, but after just a few miles, decided I didn't like riding in an old lumberwagon. 60/65 seems to be the sweet spot for the Four Winds. I didn't have any wandering problems, as the ford is always light in the frontend and had to be herded between the fencerows.
We are picking up our new Sunseeker in a little over an hour from now... so I'll have a whole new machine to learn & tinker on!
2016 Forest River Sunseeker 2250SLEC Chevrolet 6.0L