Learning 1: Cameras are extremely tough
On this trip, my camera was a tool. And for tools to fulfill their purpose, you have to use them - even in bad weather.
I see many amateur photographers who pack their camera away at the first sign of rain or snow. If I had done the same on our expedition, no film would have come out. The first time I really noticed how robust this technology actually is was when I was skiing: Camera on the front of my backpack, I once fell lengthways forwards into the deep snow. Completely white, the camera too - and I panicked. What happened? Nothing. It worked perfectly.
I took it to the extreme on the expedition: The camera hung unprotected around my upper body at all times, in wind and weather. I often left it outside the tent at night - the next morning it was sometimes completely snowed in and worked perfectly. Even the batteries never lost more than 2-3% in the cold. When water got inside after a rainy day and my shutter froze, I held the camera over the running petrol stove for 30 minutes. After that, it ran again without any restrictions.
I once blew up my drone in a snowstorm and 40 km/h winds. The six others could hardly believe that I would risk it in these conditions - but how else would I have gotten aerial shots of us in the snowstorm? The DJI Mini 3 Pro flew without any problems.
Next time I would only do one thing differently: keep heavy rain away more consistently. Moisture doesn't necessarily damage the camera (in my experience), but it can paralyze it for hours or days.
So don't be afraid to use your camera in adverse conditions. This is the only way to achieve results that are not just good, but outstanding.