Thanks! For the “group of chalets” case, where you can rent individual self-catered, self-contained, detached holiday homes, the Wiki now suggests tourism=holiday_village as an attempted replacement.
But in this thread, =holiday_village was suggested not as a tag for a holiday resort but as a tag for a sort of campsite, a facility that can be rented as a whole by a school class, sports club, or youth group, and contains dormitories, shared bathrooms, shared sports facilities, and a dining hall with a capacity of 70.
If we ever sort out the ambiguity of tourism=chalet, it would be good in my opinion to have separate tags for these two types of facilities.