I spent two nights at Lake Glycksjön and had the lake to myself for two whole days. It’s a dreamlike spot. The cabin is a bit leaky, and when it rains, it can be tricky to find a spot where it doesn’t drip, but overall it’s a cozy little place with a fire pit both inside and outside the cabin. There’s also a small toilet hut.
If you can, stretch the previous day and spend a night here instead of Flat - camping site is way nicer and hut is definitely better then a shelter in an unpredictable Swedish weather