This winter has been a major learning experience for me since downgrading from 1,220 sq. ft. worth of living space to 358 sq. ft.
My biggest lessons have been in insulating the underside of my travel trailer to keep the holding tanks from freezing up. I will have to think of better ways to hold the temporary skirting up around the bottom...well, I have all summer to think about it.
Meanwhile, I have taken all the tarps that I had duct taped to the bottom off, folded them and have them stacked up under the trailer. I have to figure out how to get the duct tape off. It really stuck on there good.
This winter the I only had one really bad day. The gray and black water holding tanks were full and I couldn't dump them because they were frozen solid. I hauled butt up to the Lowe's and bought a cheap propane heater and tank. Set it up underneath and burned it on very low. Every 15 minutes or so I went under there to feel the bottom of the trailer to make sure nothing was getting singed or too hot. After three hours both tanks were finally melted enough for me to dump.
Oh...there was another day where it got below 15 degrees and the water hose that brings in all my water froze up solid even though I thought I had insulated it enough. My son and I spend half a day wrapping that hose..... It took 2.5 days to melt and I found out that I needed 2 gallons of water a day to take a bath, wash my hair, make coffee, cook something to eat and clean up afterward.
Besides that, it was pretty cozy all winter. A tank of propane lasted for about 2 weeks until it was time to refill, but that was only if the temps stayed far below freezing for an extended time.