Desert Captain wrote:
  My  24' C sits in our driveway and has 30 amps 24/7.  Later this morning when it warms up a bit I will open all of the fresh water drains {along with draining the water heater which will get a cup or two of the anti freeze} and then will blow out the water lines with my compressor.  I'll add a cup or two to each of the traps {2 sinks and the shower} and put a couple of quarts of pink RV anti freeze in the black and gray tanks.
For nights that are  predicted to drop below 30 I will turn on the tank heaters and run my 1300/1500 watt AC space heater on low to hold the interior temps in the 50's.  The lower cabinet doors will be propped open for better air flow.
I keep the 55 gallon fuel tank ..... full   Only thing left to do after all that is to restock the bar...  :C
Yo DC, what's up?  Jelly of the snow pic from last year!
So, idk how much experience you have with cold weather and winterizing, as I know you moved up from Tucson, so take this as constructive criticism or advice that will make things easier and learn things you don't need to worry aboot.
Adding AF to water heater?  Don't bother.  Drain it, put the plug/anode back in and call it a day.  If you're worried about the little bit of water in the bottom, don't be.  If water has room to expand, it will not break anything.  And if it is still bothersome to you, jamb that air chuck in there and blow the tank out.  Stand to the side...for obvious reasons.
Same with the tanks.  Drain them, pour some AF in the P traps and walk away.  Won't hurt to add AF to the tanks, but FW tank is the same, right, could have some water, but not adding it to that tank, per your post.  And don't need to.
After doing whatever you consider to be a complete winterization, why are you running a space heater (I doesn't "bother" me in theory like it apparently does to some people, lol)?  Just to keep the empty pipes warm?  Aint like you're worried about moisture/humidity where you're at.
Lastly, full tank of fuel = old wives tale, seriously.  Unless you're prepping for a bug out vehicle or something, run 'er down low on fuel rather than letting a significant qty of gasoline degrade just to have to burn it up later as poor quality fuel.  But, if you're leaving in Jan, the fuel won't be old anyways unless it's already old.
In short, condensation risk is minimal to zero, and ethanol blend fuels will eat up any small amount of water "if" there is a little condensation, as quick as you please.  
I agree wholly with re-stocking the bar!