Both MCM and SA do specific "Contest Issues". MCM's is in February, and SA's is around October. However, during the rest of the year they will have various other shows featured in various issues. It all depends whether or not the magazines either send someone to the specific shows to shoot pictures, or, the show themselves have their own person shoot pictures and then send them in to the magazines. If you have subscriptions to the magazines, or buy them regularly, just keep looking for the specific shows that you've attended.