I'd say don't let all the negativity dissuade you. The crater is normally not as penitente'd (?) out as the above photo. While not frequent, camping in the crater is relatively common. You can often find a spot that's slightly more protected. Worst case scenario (barring a shit-storm on the summit in which case you'd hopefully either never climb or descend w/o bivying) you'd just end up with a cool story about another miserable night in the hills. Best case, cool story about another beautiful night in the hills. Both worth it.
Late August weather can go either way but is often nice. I wouldn't put too much stock in any predictions made now. Conditions on the DC route were "interesting" this past season...but no telling what that means for next year. So set your dates and go give 'er. Be safe. Have fun.