Mount Rushmore in the Winter

AS a snow country driver (from Rochester NY) I have worked very hard to never be in a position that requires me to drive the coach in any kind of slippery weather. I know how to do it and am quite competent at it, just would rather not have 30,000 pounds of motorhome plus tow'd start to move sideways or not at all. I understand the desire to have the parks to yourself just need to prepare yourselves and your equipment for extreme cold. sitting in my son's driveway in VA when the temps dip into the teens (in the mountains) the propane starts to go very quickly. I use external 30 lb tanks (7.5 gal) to avoid having to make a nasty trip in the coach to top off, I run through one in just a few days! I keep a spare filled in case we run low over a weekend. It should be fun, just not for me, DW is complaining because it is under 72 right now :)