Some further comments: The lake at Trail Camp is not fully frozen over. You can get water there. Same for consultation lake.
I haven't been up the switchbacks but my understanding is that microspikes and poles is all that is needed. Note that you still need to ascend low grade snow to start the dry switchbacks. My guess from looking at the switchbacks is that there are probably 3-4 snow crossings that can be easily done with poles and spikes. Hiker beware, as I haven't done it.
