I went with the stock attached power cord and installed one of these in the rear baggage door, that way I can use my 15 amp outlet at home without adding additional exterior connections. Inside I attach the 15amp to my 30 amp power cord via a 15/30 adapter . The only time I use the stock power cord is if we are going to use air conditioning, then I pull it out. Using the 15 amp cord is easier to handle, particularly when it is cold out side, that 30 amp cable can become quite stiff.
What you get by achieving your goals is not as important as what you become by achieving your goals....