I was on Silverthrown in 1998, it took us 16 days round trip from Wonder Lake but we never summited due to weather. We camped at the notch around 10k if I remember correctly. Then we were pinned down for 3 days and just spent time digging the tent out. Of course, as soon as we got back down the weather cleared for a few more days. Awesome spot though. Lots of crevasses on the Muldrow and Treilika(?) but manageable. Not sure what conditions are like these days though. I've got some old pics but not with me. PM me if you want more details. Not sure what conditions would be like in late August as we did it in early May.