Hi,
I've replaced all but one of my outlets with standard home receptacles.
I also added two additional shore power cords. They come in via the regular shore power cord box. So I have the OEM 30 amp, a 20 amp and 15 amp shore power cords.
The 'extra' shore power cords power dedicated outlets which I can use for additional electric heat.
I have a 'break out box' which converts a 50 amp to a 30 amp on one leg and two 20 amp outlets on the other leg. Each outlet has its own breaker.
In the dead of winter I draw a peak load of 7000 watts which allows me to heat 100% electrically at -37 C.