Well, actually if I were you I would definitely check tutorials and scenario maps in in the game and located I think in a public.zip folder but you would need notepad++ for it to be opened i mean in order to see the code about triggers how are used and in-game texts in tutorials, also check https://trac.wildfiregames.com/wiki/Triggers and https://trac.wildfiregames.com/wiki/Atlas_Manual. A little bit more preliminary support for campaigns comes with Alpha 23 https://trac.wildfiregames.com/changeset/21540 and other commits, later on, concerning trigger scripts, so with Alpha 23 it would be much easier. Maybe @elexis and @wraitii would know more.