As Ed stated get a dogbone adapter and enjoy. With my prior class C which was 30 amp we stayed at one campground that was 50 amp only at the pedestal. The owner there had a supply of adapters he would loan out if necessary. They told us about the 50 amp only when we made the reservation so I bought my adapter before we left home.
Also, it only takes a couple minutes to call the campground to verify what they have at the pedestal.
US Army (Ret)
2020 Entegra Accolade 37TS
2019 Jeep Grand Cherokee Trailhawk (Toad)
FMCA - F432054