I know most of us realize the need to drain and prepare our plumbing for it's winter's nap but there are some other items that may need special attention. Keeping your battery
plugged in or removal to a interior location is suggested. In addition, your propane
refer fluid may freeze with temperatures below 20F, so either close off the exterior refer vents or operate off 120v if available to keep it warm. Televisions, particularly LCD's may be affected by the colder temperatures.
Here is a interesting link to a winterizing thread I found for some good ideas to deal with storing your Egg over the winter.
RV.Net Open Roads Forum: Full-time RVing: Winter RV camping