THIS MAY BE CONTROVERSIAL
If you own a camper or other recreational vehicle, it probably has a battery or two or at least is set up for a battery.
If you want to utilize a battery in your RV, battery selection is paramount and probably more important is the proper charging settings.
Now if you only camp in campgrounds with umbilical cords to the power grid, you don’t need a battery bank. But I will suggest that you are missing a lot by “camping” in these virtual parking lots. Get thee out into the more wild areas where there is no electric grid. It is called camping, you know – not Parking.