So I'm not sure exactly what the go is with the new Saga quest Helms Deep and its interaction with player side quests.
For example if you play Gather Information while at stage 2, 3 or 4 what exactly happens.
So as we know when there are side quests (encounter or player) in play at the beginning of each quest phase you choose which quest is the current quest for this phase.
If for example you choose Gather Information does it gain the defense keyword? Every quest stage in play still contributes its effect whether it is the current quest or not. See this rules discussion:
https://community.fantasyflightgames.com/index.php?/topic/174096-side-quest-and-principal-quest/
However when you look at the rules for defense it is the same as for siege and battle and only applies if a quest with Defense is the current quest so therefore Gather Information would allow you to quest normally when you choose it to be the current quest.
You can therefore play Gather Information, choose it to be the current quest each turn and even if you do not quest successfully rather than playing progress on Stage 2 3 or 4B (getting closer to defeat) you will instead gain threat. Even if you do quest successfully if you take multiple turns to clear Gather Information (or even if you do so in one go really) that is still a few turns you did not have to stop the encounter deck placing progress on the quest via the defense mechanic and a few easily earned tokens on Defense of Helms Deep.
To me this seems a little bit dodgy and can give you a fair bit of an advantage/edge in this quest if you use multiple player side quests to get tokens on Defense of Helms Deep without having to defend against the actual siege. I guess on the flip side you may accidentally have your threat raised by A LOT by using this strategy considering the very high threat this quest generates and consequently may threat out or have too many enemies engage and destroy you due to a higher threat than normal.
Just wanted to bring up this weird interaction with player side quests and this saga quests mechanics. I am not even really 100% sure this is how it works so avoided using gather information in all my games against this quest as I just was not sure how it would work and did not want to risk playing incorrectly.