Highway 3 is a route I've driven frequently and often in my life. Traditionally I've remembered Sperling as being the big omnious S. I remember hearing about a death around the S in icy conditions. The road has since been straightened, repaved and the access points changed to make it an easy drive today.
The cache is an easy walk in the park. It's findable in winter, but will be a trudge through the snow.
Please make sure to seal container completely.