"I was shocked to read the authors proclaim even additional savings when in camp grounds where electric charges are not metered, but included in the site fee."
Maybe I'm misunderstanding something here. Campsites that include electric in the price? It seems to me much-much-much more electricity is used in the Summer by a LOT more people camping by running their air-conditoners, then the few who winter camp and use electric heat?
What's the difference? The price of the campsite is factors in the use of electric, for summer months and winter months.
As far as the CheapHeat product? I don't think it really matters what one uses. Basic physics ... Only so much heat can be produced by only so much "fuel", and that's it! The difference is in the price one pays for the device that changes electricity to heat and how efficient it does that.