30 amp service

I have, and have used one of the splitter, (called power thieves), and if necessary, will probably use it again. However, be very aware that in many campgrounds with only 30A outlets, the underground wiring supply was and probably still is, designed and sized to support 30A loads. This is why you see so many that have burned out plugs, and possibly low voltage problems. When people try to pull 50A through wiring and breakers designed for 30A, something has to give. Usual symptoms are overheated burned outlets, and lower than normal voltage, which creates more problems and probably damage. You can easily run a 50A coach on 30A, if you just don't try to run everything at the same time. If you have to run everything, then only go to places that have good 50A service. A good rule is that on 30A, you can run two heavy loads, such as an AC and a hair dryer, on 50A, you can run 4. Get a plug-in voltage meter, and watch the voltage. If it drops too much when you use something, you are overloading the master circuits.