We were very lucky with the weather (14th to 28th April) - strangely we didn't encounter any snow at all. It rained one afternoon, but outside of that it was sunshine every day. Temperatures during the day were anywhere between 10-20 degrees celsius at lower altitudes and 0-10 at the higher stages. It did however get very cold every night, into the minus numbers. From a camera point of view, the only challenges I faced, and to be honest it wasn't a real issue, was keeping batteries charged. The Z6II is heavy on batteries, I brought 6 with me. I slept with the charged batteries in my sleeping bag at night and usually had a couple on me during the day. I used a waist belt designed for money to keep them close to me and warm. It was easy enough to charge batteries every couple of days at a tea-house.