As far as I have understood it, in order to publish a campaign, I have to publish every inlcuded quest first individually.
This would mean, that playing quests in a storyline or level/difficulty order is not mandatory, because players can still pick the individual quests (I could probably make the single quests "unfindable" but I wouldn't like to do that). What I have not found out yet, if I can unpublish quests once the campaign is succesfully published.
In case you find my grammar or spelling weird ---> native german speaker
Comments
I would not call your quest some random string of gibberish though, players will always see the quest name even when selecting from a campaign. names like XX454kHJHJFLA would defiantly stop players from trying your quest.
Just name them as normal and hope people play them in order. Would help putting "Quest Sandwich test - Part 1 Of X"