Hi Chris,
For no scientific reason, I run 90 in the fronts, and 85 or 90 in the rears. Full inflation is not required because not much weight is carried.
Have you had an opportunity to tow any significent distance yet? Are you using the factory hitch, or did you install an air ride hitch? (End of interrogation) :-)
onezman
http://onezman.tripod.com/whitehotrvhauler