IMHO, Pubtym has a point. As you mil/civ aviation wrench benders will recall, one of the primary reasons for N2 aviation use is to reduce corrosion from water vapor in the tire assy, particularly at the bead and valve.
With "air", water can migrate to the bead/rim wall & cause trouble. If an RV tire were to be originally installed with N2, or shortly after original installation, the amount of corrosion would be minimized.
I'm still using air, but considering N2.
03 Adventurer 38G, W22, 22.5 Whls
Koni FSD's, TracBar rear, SteerSafe, 50A SurgeGuard, Eternabond; 2012 Honda CRV EXL w/Nav & AWD