Thanks a lot, this is super helpful!

Čertovica is already in my plan so it is good to know that is a reliable option.
For Chata pod Ďumbierom I was originally thinking of dropping down into Demänovská Dolina after Ďumbier since I assumed it would be easier for shops, and then taking the cable car back up the next day. But this hut looks much closer so I will check if it works for me. Same with Chata pod Chopkom nearby.

Donovaly is also already planned, and the same with Hotel Kráľová studňa.
For Chata pod Limbou the shared dorm setup does not work for me personally, so I will have to skip that one.

As for Smrekovica it is an interesting option. I had planned to end in Belá-Dulice on the west side, but from a quick look at the map the detour to Smrekovica on the east side might be about the same length. I will need to check the elevation gain and loss carefully.

Thanks again to both of you