Based on observation that some quests are repeatable and some are not, and that some quest-giving locations disappear and others stick around the entire game, I have the following questions:

1.If a particular quest level doesn't have any repeatable quests, what happens once I've done them all but there are still inns/huts/ruins/whatever for that quest level on the map?

2. Actually for that matter, is the quest generated/tied to the hut when it is revealed or is it when you move onto it?

3. If I walk onto a hut that I've never been to and nothing happens, is it because another faction already got it? or because I'm out of quests for that level? Or just not working as intended yet?

4. And when I complete a quest why exactly DO some huts stick around? Is that intended or not?

Thanks in advance if anyone has any insight, and my appologies if these have been answered elsewhere.