Here is a picture of our trailer in storage after the first significant snowfall of the winter season in the Saint Paul, Minnesota area, in early February 2003. (Saint Paul usually gets 3-5 significant snow storms between mid-November and early February.)
On that same early February weekend, we visited Galena, IL to spend the weekend with friends at a bed and breakfast. We could have paid ten days of full hook-up campground for the money we spent in the bed and breakfast for two nights! No matter what the weekend cost, it was well worth it. We needed to get away and restore our sanity. The owners of the B&B were very friendly, and we will probably visit the Galena area again next year.
If you are wondering, preparation for winter storage consists of placing the trailer frame on jack stands (near the axle), leveling the trailer, and lowering the stabilizer jacks. Also, all water tanks are emptied and the water lines and water heater is pumped full of non-toxic anti freeze. A bit of the antifreeze is also left in the toilet bowl and also the sink and shower traps also. We leave the trailer plugged into electric power almost all of the time to prevent the battery from discharging, and also so we can "escape" to the backyard office every now and then. We don't worry too much about snow buildup on the roof, but we will remove most of the buildup within a few days of accumulation.
We do use the trailer as an office when not camping all year long. Telephone and Ethernet jacks have been installed and connected (see modifications and repairs). An inexpensive 1500 watt (5100 BTU) electric heater provides most of the heat needed to be comfortable (30 degrees warmer than outside temps), with the furnace providing additional heat if needed.