Depending on the way the ice forms, this has everything from WI3- (very short section on the right) to WI4 (on the arete to the left). There are a few good trees at the top for anchors, but bring static line or webbing - they're set a bit back. This wall gets a LOT of sun, so it stays fairly warm - if there's no wind. Also, because of the plentiful sun, this is the first section to get baked out.
From the parking lot, walk across the road towards the wooden steps (or, wooden sign, if it's been snowing). Angle left at the top towards an old railroad grade, and follow that for about 200 feet or so until the steep slope on your right touches it. Make a right, and take the path of least resistance up to the ice you can see above. Be aware that the ice actually extends a fair distance from the top; it might be prudent to don your crampons to have purchase, especially if there's a lot of snow on the ground. The alcove at the top (on the left) is the Playground; the large, hanging columns (center and right) are Twin Columns; walk at the base of the crag to the right and around the corner for Sun Wall and the walk-around.
Descend either by walking carefully (important in a large group), or by glissading.