Yes, the 30 amp main breaker in your RV's power distribution panel (breaker box) means that your RV can never draw more than 30 amps without tripping the breaker. You need to purchase a 50 amp male to 30 amp female dogbone adapter to plug your RV's shore power cord into the 50 amp receptacle in the power pedestal.
That aside, most power pedestals that provide 50 amp service also have 30 and 20 amp receptacles as well.
Rusty, Sandy, 2 Shelties (Coby & Callie) & Conner the Campground Cat
2016 Ram 3500 Longhorn Crew Cab 4x4 Dually, 385/900 Cummins, Aisin AS69RC, 4.10 axle, 39,100 GCWR, 30,050 trailer tow, B&W RVK3600
Current: 2014.5 DRV Mobile Suites 38RSSA #6972 - Previous: 2004 MS 36RE3 #1291