[scrubjaysnest]

Originally Posted by nylesn

I use a portable electric heater instead of the propane heater. The propane heater is great; however, it uses a Hugh amount of propane.i

Although the furnace does use a bit of propane, they aren't very efficient, here is a cost thought for you. On average a federal cg with elec will cost you an additional $5 per night. 4 nights = the cost to fill the 20# propane tank. Sometimes you can find propane @ $10 to $12 per 20# not very often.
A "Buddy" type Mr Heater will heat the camper fine, at least for us, and is more efficient. Corps of Engineer(acoe) are usually the cheapest for electric sites among the federal CG's; $22 per night in most cases -vs average $25 per night for state parks. The cost at acoe is $11 with the golden age/inter-agency pass. Other federal CG's give you half off the sight but elec is $5 to $7 bucks; no discount.