winter full timing

I know i want a TM 2720SL for family trips, been looking at them over a year and read everything I can on the net- I also am starting a new job where I have to attend training away from home for two months starting 29 September and ending the end of November...in the Pacific Northwest.

I am considering getting the TM and living in it by myself for the two months I'll be attending training...and boondocking most of the time to save money on RV park fees...has anyone done this in a TM before? I know the sandwiched Styrofoam construction will be good insulation, but good enough to be comfortable in Northwest early winter months? what winter boondocking tips can anyone give me? Thanks

Kevin