Dual pane windows are a must. Most Bounder and up Fleetwoods have dual pane windows.
You might want "Aqua Hot" it will warm the floors in most cases, or have several heater fans through the coach, and use hot water from a diesel boiler to warm the coach. You will not need propane as frequently.
I have a Olympic Catalytic Safety heater, and it provides constant heat - 6,000 Btu's is good for about 40F outside air, below that I need to run the furnace a bit to blow hot air into the basement to heat it, and distribute hot air into the bedroom and bath. It does not use any 12 volt power, so you will not drain the battery while dry camping.
Many who camp in a park with 30/50 amp service will also run 2-3 electric portable heaters, 1,500 watts with a fan.
Some use the much larger oil filled heaters, but I don't like them, they are to large, take time to heat up and must be shut off a 1/2 hour before putting them away.
Some use "Ceramic heaters" but I don't like those because they do not put out heat in the 'safe' range of 85 - 105F. Some ceramic heaters put out 130 - 165F air, hot enough to burn you, and not safe around all types of fabrics.
You will probably want a 50 amp electric service. It will plug into 30 amp campgrounds with a adapter. The 30 amp service, you must limit your electric use to just 28 amps at 120 volts. So you would need to shut off the electric heaters to run the microwave and toaster. You can not make coffee, (10 amps) toast (8 amps) and the microwave (12.5 amps) all at the same time (30.5 amps + the battery charger that is on all the time at 1-2 additional amps).
The 50 amp service has two legs at 120 volts at up to 50 amps (12,000 watts total).
Also you might want to consider heat pumps. While they do not provide any heat at less than 40F (the internal thermostat changes over from heat pump to gas furnace at 40F) at between 40 and 65F they can produce 13,500 Btu's per hour, and not need to run any other heaters. A heat pump can produce 80,000 Btu's of heat for about $0.80. It would take a gallon of propane to make the same amount of heat - locally $2.29 a gallon now. The oil boiler is less efficient, but uses 135,000 Btu per gallon diesel fuel and can put out about 100,000 Btu's of heat into the RV for each gallon of diesel burned (due to some going out the flue, ect.) Or run a electric heater, using about 22 KW, costing me about $0.10 per KW or $2.20 locally. Many campgrounds include electric in the basic fee, so electric heaters are quiet and free to run!
If I lived in Alaska, I would want a RV with at least 65 gallons fresh water, so I could take a daily shower for a week out in the backwoods, and not need to go into a campground to dump and refill the water tank. I have a 100 gallon tank in my 1997 Bounder 30E (without a slide). I can camp 2 weeks!
I dig a hole about 12" deep to drain the grey water and bury it at night to keep away flies.
Have fun camping!
Fred.
