Assuming you have a 50 to 30 amp adapter so you can plug in to 30 amps (similar if all you have is 20 amps), it still depends on how your RV is set up. If it has an EMS (Energy Management System), then some things (air conditioners, washer, etc.) will get disabled if the total load gets too high. Otherwise, you'll need to be careful not to run too many things at once, especially air conditioners, microwave, washer/dryer and other high current devices, else you'll probably pop a breaker.