Up until today I've been driveway camping. My 2010 camper has double opposing slides in the rear and came with an electric fireplace. I've been using it every day. I keep the furnace set on 65 deg for when it gets colder at night.
That all ended today once I winterized the camper. I figured today was going to be the last 60 deg. day we have this year so it was time to winterize and close up for the season.
RV electric fireplaces are reasonably priced, readily available and fairly easy to install. So, if you have a place in the camper to put it make the wife happy and go for it.