Another great option is a heater. Tent heaters can get a bad rap due to safety concerns; however, electric heaters are safer than gas.
Because they are electric, halogen heaters eliminate the risk of carbon dioxide poisoning from combustion and the asphyxiating propane gas from propane heaters and stoves.
Electric heaters can heat a larger tent quickly, which is a lifesaver in below freezing conditions.
However, with this option, you will need an electric power source, such as a generator.
Of course, any heater should be turned off before sleep.
They should also be kept away from flammable materials on a stand or flat surface, which is difficult in a polyester tent.
Additionally, it also shouldn’t be left unattended.