Winter camping - any advice?

I plan on taking my 179 to Rio Grand del Norte (north of Taos, NM) the first week of March for some winter fly fishing and maybe a day skiing.  While days might touch on 50 deg, the nights usually hit the upper teens.  I have some anti freeze in both the black & grey tanks but any advice for the freshwater tank & pump?  I used the compressor method to winterize for Dallas, so the fresh line is currently dry.

I take it you will be boon docking. It would take cold for a considerable time to freeze the fresh water tank. However you can carry water for drinking and cooking and leave the tank dry. Any water you use from freshwater tank is going to go in the black and grey tanks. Same for latrine use. If you are camping at an improved site, they make a heated water hose, that I found handy. My last experience in winter camping, what froze were the drains. I didn't have a "Y" drain hose, so I hooked up to the black and the grey drain froze.

yodt

I was in the Rio Grande outside taos last march in our 182g twice.  What elevation will you be camping at?  I had no problems and like Mcarter said, it takes a long time to freeze that water and most of the fresh water plumbing is somewhat enclosed anyway.  I would fill up the fresh water tank and use it.  The heat from the ground will help provide some heat to the bottom of the pod and the furnace takes care of the inside.  you can leave a small drip as well and use the vault toilets if you have them. 

Thanks for the great advice all, I'm looking forward to the mountains as always!

We just went up to Taos Ski Valley from Dallas for the long weekend to go skiing in our 2016 176 Rpod.  I wanted to have access to water and shower so I put heating pads on the three tanks, 12V self-regulating heat tape on the exposed fresh water line from tank and wrapped in the pipe insulation with aluminum tape going on before and after.  I also put the heat tape around the grey water valve.  Last weekend it was subzero, around -6 at night in the ski valley but was warming up to near freezing during the day.  The only trouble we had was that in the morning each day the hot and cold water to the shower as well as the toilet water was frozen.  We left the electric heater on high all day (took a generator with us) and when we got back the lines were no longer frozen.  The lines are not exposed but run through the floor.  So I suspect that just being adjacent the bottom layer of the floor was enough to freeze the lines at these temps.  Not sure what can be done about that except maybe putting insulation under the Rpod or adding a skirt?  The electric heater would keep up with keeping the RV warm inside, even too warm.  We didn't add any extra insulation anywhere.