There have been several discussions on how to best prepare for a long drive. With the decreased range of winter travel, I wanted to ask opinions about what to do just before a long drive. So, if I range charge and want to heat the cabin, would that heat draw power from the plug or the battery? Is there an advantage to pre-cabin heating before I leave? Does pre-cabin heating warm the battery or should I do something else. I am concerned about a 215 mile round trip with some steep hills. The round trip will also include a few hours where my car is parked and not charging when I arrive. Thanks.