Bump! Narrative now automagically saves and loads quests without you having to do a single thing. Narrative will load your quests on BeginPlay, and Save on Endplay by default, but you can manually save/load using SaveQuests() and LoadQuests(). You can turn this feature off if you only want to save or load at certain times.
Should be in Narrative in the next couple of days, just waiting for epic to add it in!