All good info the folks have posted. I spent one winter in Fort Leavenworth KS (No not at the DB or the Fed Pen) while attending CGSC and did as posted but without the hay skirting. There was actually 5 other students doing like myself (staying in RV's) for the year in purgatory. 2 Navy like myself, 1 Marine, 1 AF and 1 Army.
One thing I noticed is that most of my drafts were around the entry door on my M/H. Not sure what it will be like in your unit. Course once leveled you are out of air so step cover was no good. Fashioned a piece of cardboard to cover the steps and that cut down drafts. Easy to move when needed.
Another thing you may notice is humidity in your unit. Pay attention to back walls of cupboards and closets. If you get a moisture buildup open the cuboards and closet doors to allow air to circulate.
My tanks and bays were heated but I also hung an incandesant work light in the water bay.
My M/H has two furnaces. The front of the M/H with the huge windshield was always colder than the the rear. I was able to close two pocket doors one leading to the bedroom and one just aft of the fridge which to me seemed to help in the furnaces not running as much and keeping the mid and rear sections of the M/H warmer on the real cold and windy nights.
Like Steve said keep your eye on propane consumption. Luckily where I was staying the propane guy came around every 3 to 4 days.
Jeff