You would need a 50 to 30amp adapter plug,,,, I have never seen one,,, Camping World does not list one. Now if your an electrician or have a friend that is,,,you could make an adapter and only use one leg of the 50 amp circuit, you would still be on a 50 amp breaker in the park box... but you should be able to run anything and everything. But I have never seen a campsite or campground that has only 50 amp,,, if they have 50 amp,, there has always been a 30 amp plug also.
Jim M