If you end a quest can you still access the quest script variables? Or does everything about it go kaput?
I was curious about this so went and looked it up in the wiki. This is what it says about your question.
Quest variables can still be accessed and modified when the quest is not running. When a quest is stopped, its script is not being processed, but it still exists and the state of the variables remains intact.
Here's the link to the page if you want it:
http://geck.gamesas.com/index.php/Quest_scripts
I don't actually know from experience if it works this way or not. You'd need to test it to know for sure or wait for somebody who's done it for verification.