Just be darn sure you aren't plugging a 30 amp 120 volt RV into a 30 amp 240 volt generator outlet or poof! 30 amp RV supplies are "always" 120 volts, 50 amp RV supplies are "always" 240 volts (two 120 volt legs opposite "phase"). If the RV has a 50 amp shore power connector, it can be rigged to run on a generator 240 volt circuit, regardless of generator wattage, but you may need to manually shed loads to match the generator's output. Generally a 50 amp 240 volt plug has 4 connectors, 2 hot, one neutral, one ground. An RV 30 amp plug has 3 connectors, one hot,one ground, one neutral.
In short, make sure your adaptor is intended for RV use.
Ole and Anne Anderson, Highland, Michigan
'02 Adventurer 32V, Ford F-53, ours since 4/08,Goodyears, Konis, SeeLevel, CHF
'84 CJ-7 , 5.3 Chevy, 3" lift, 33's, Detroit Locker, Fiberglas tub, winch, hi-lift