1) You shouldn't have to do any extraordinary things to spend the winter. The coach is capable as it is. Make sure you crack the ceiling vents once in awhile as moisture can be a problem when it is closed up in cold conditions. A heat tape wrapped around the water hose and encased in foam insulation will enable you to use the water all winter. Watch out with your sewer though, you may want to let the tanks fill then dump if it below freezing.
2) Are you in a security challenged area?
3) It is probably under the entry steps. ATF