You can walk down to the shops from GRAND TIMBER LODGE, but also will be a short (2-3 minute ... free & continuous) shuttle ride from downtown. The service leaves the resort every 15 minutes or so, and you can call the driver directly for a pick up, whether at the resort or downtown shopping or in a restaurant. Although we drive to CO, we never need to take our vehicle out of the parking lot and mess with parking, as the shuttle service is so efficient.
There is ski locker storage at the Lodge, as well as a ski rental/service shop on property. Not to mention the store, bar, restaurant, spa, indoor/outdoor pool, many hot tubs, inside and out, etc.....
Also, there are shuttles that go between the other sister resorts if you wanted some skiing variety.