According to Michelin's
Load-Pressure Chart you need 75psi front. That's a mixed blessing, because that much weight on the front definitely helps tracking. Chart suggests 75psi rear too. I'd say 65+65 (corrected on edit from 75+75) just be sure you have an accurate gauge.
What the door sticker is doing is this: Recommends the pressure required to achieve the max GAWR's of the Front and Rear Axles. Takes into account the differences in tire load ratings between Single and Dual. Does NOT take into account how the RV is actually loaded.