Here is one more way to go.
My group (including my cousin and my daughter) hiked from Minaret Lake to Iceberg Lake (and beyond) in late Aug of this year. We missed the use trail where it branches north and didn't realize it until we arrived at the cliffs. My daughter and I rock climbed up to Cecile Lake, but my cousin is uncomfortable with heights. He ended up following the creek west up to the little tarn south of Cecile and then walking north to Cecile. He said that way was technically easy, so it must have been class 1 or easy class 2.
One more thing, when hiking down the steep slope from Cecile to Iceberg, the use trail descends from the outlet of Cecile, not earlier. When we were there two groups, one probably following the other, started their descent from the east or northeast side of Cecile and fought their way down the trailless class 3 (?) slope. Numerous rocks were dislodged above us and people were obviously in over their heads.