and, to 'add to the equation': some 30amp RVrs actually LIKE to plug into a 50amp rv service outlet - as these breakers get less overall usage, and therefore don't have some of the symptoms that many 'overly used' 30amp breakers tend to get, such as early tripping, because they have become 'weak' over time.
A 50amp rv service outlet is two hot legs flowing thru a double-pole 50amp breaker, so it's much different than the typical 30amp RV outlet, yet your adapter gives you the ability to make use of this 'better' connection and service. The wires are larger, and since the breaker has had less 'use', there is less of a chance that 'early tripping' will happen.
While you can plug into a 50amp outlet with the correct adapter, your RVs main panel will safely provide the protection - which is why you have your own 30amp main breaker...
no worries - enjoy.
'14 Palazzo 33.3 bunkhouse 34' diesel
KingTailgater2 Dish HD, 100w/5a SOLAR, BlueOx
100,000+mi since '14 - US, Alaska, Canada - Hiawassee, GA! (also, '14 Gulfstream Amerilite and '07 ForestRiver Rockwood) : )