very well-thought-out and reviewed trip, Lindsey. i would guess winter camping would be too much work for most people. And you've been 3 times! you will find your groove with it and then your mini-me will want to get involved.
Clearwater is such a beautiful lake, it would be been relaxing and rewarding to just sit and look at the surroundings. the lake cracking and moaning can be unsettling, it sounds like you all adapted very well.
Very nice trip report, Lindsey. Hope you decide to keep winter camping. Maybe just working on more layering options for extreme cold that you encountered. I sometimes think the hot tent is just torture when the fire goes out overnight. Such extreme temp drops you're bound to get chilled. Warmer weather and soft water is on its way!