The route is not nearly as complex as this page makes it out to be. See http://www.nwhikers.net/forums/viewtopic.php?p=1104304 for a description of what we did. Fun scramble.
Did as part of my big Glacier Peak Wilderness Trip where we climbed Emerald, Cardinal (including its south peak), Saska, Pinnacle, South Spectacle Butte, Fernow, Copper, Flora, Martin, Bonanza and Dark Peaks. 9 days, 78.5 miles, and 44,300 feet gain!
Did the NE ridge of Copper after traversing from Fernow.
This is the ridge Beckey describes as "moderate climbing, FA by two unknown miners," not the easier northeast ridge. It took ~4h30 from the Holden campground, with a ~5.5 crux. A fun route, with surprisingly good rock for the area. Trip report.