I don't see any problem with having a Contest Guide as part of the ingame expansion, but it isn't like this is going to become an even remotely significant portion of the site.
If someone makes a guide, great; if not, oh well.
Just as a reminder to the OP and anyone else posting in the suggestion box...all of our content is user made, so if you think it would be cool to have something on the site (and there is a place for it, e.g. Ingame Expansion in this case) then feel free to do it yourself. If you're unsure of how to get started, don't be afraid to ask for help.
EDIT: Oh and by 'ask for help' I mean PM the appropriate mod / badgeholder, I don't want to inadvertently encourage people to post a bunch of question threads, lol.