Mount Rushmore in the Winter

I am still fairly young and don't mind taking some risk with traveling up in those areas during the winter months. I love touring around in areas with fewer people because I hate lines and waiting. I tow a Jeep Sahara and it did great in Silverton a couple of years ago at Christmas. The snow was about 1/2 the depth of the tires through town. Loved it! The route I am going, does not look like it will take me through any tremendously high mountain passes, but do have a set of chains for both vehicles if snow gets hubcap deep on a Ferris Wheel.