Highway 3 is a route I've driven frequently and often in my life. Traditionally I've remembered Brunkild as being the place to stop for gas and for a short time, the place to stop for a burger. The burger shack used to be next to the gas station, but its since been moved to Morden.
The cache is quick walk in the park. It's findable in winter, but might be a bit of a trudge if the path isn't cleared.