Conferences are a problem I've been meaning to work on. There are only a very few conference series in the world for which there are truly substantial third party references, but there are many of great importance: the situation is similar to journals. In practice, tho we don't word it that way, the effective criterion for journals is that papers there are highly cited (as measured by the impact factor from  Journal Citation Reports). This can apply to conferences also. The difference is that for most conferences, the papers there are preliminary results and not rigorously peer reviewed & therefore  not highly cited as compared with journal papers by the same authors. There are two classes of exceptions: ones where the papers are major review articles in the field, and ones in engineering where they are the basic means of publication.  I'm not sure about this one. Ido not think it is  one of these exceptions, and I think the publications are mainly just abstracts, as is common with many conferences.  I would need to check, & I  cannot do it this week.  
But personally, I would include in WP articles about all journals used as references here, and all major conference series, however, I doubt this would have consensus.  The compromise solution is therefore to write the articles about the sponsoring society and have a section on the conference. That is probably the best thing to do here. 
The main thing I think we want to avoid is writing articles on individual conferences in a series. This would amount to our being a nonselective index or bibliography. '''''' ( talk )