I chose the imperial side and completed the quest and they said there will still be stormcloaks camps and to kill them if I come across them. Iv come across three but they all have a leader witch are unkillable, Is there a reason why they won't die? cus I assume now that iv done the civil war quest they are not quest givers any more unless I'm missing something?

Welcome to Skyrim, where everyone you need to kill is essential and bethesda doesn't give a damn.

I believe the majority of us have had our fingers crossed that they would patch this and make them unessential, but so far nothing has been done about it.

It would be kool to eradicate them all but, I guess they maybe used in other game/dlc. Oh well lol

I think that there is a reason they are essential. Perhaps that are involved in future DLC?

For an Imperial, why would Stormcloaks need to be essential and vice versa? IIRC, they were used in cut content, but their essential tag stuck around. I doubt Bethesda would make people essential for a "maybe" DLC in the future.

Especially since all PC players can use console commands and mods to make them unessential.

yeah I think they are meant to be essensial during the civil war but the tag isn't removed afterwards. An oversight I am sure. I doubt we'll get any DLC for this though I would love to eat my words on that subject haha.

However yeah if your on the PC like I am, you can kill them. use a nexus mod called Kill Them Generals. All my stormcloak camps are empty. my own personal camp sites my character rests at from time to time.

Apparently there's a trick where if you use a Raise Dead spell or such on an Essential NPC, it'll kill them, at least temporarily so it's not chasing you across the Tundra.