In my last several RVs, I've installed a new, dedicated circuit and outlet for a space heater.
It's not often that I have electric hookups, but when I do, I use the space heater for heat. I don't camp when the weather is below freezing, so there's no need to run the propane furnace to circulate warm air around the holding tanks. In this scenario, a small space heater is all I use.
Both were easy upgrades because the new outlet location is close to the electrical panel with easy access to everything.
This video shows how I did it in my Arctic Fox 992 truck camper,