Maybe I'm being misled by the amount of draft rumours and the Steelers' openness, but I just don't think its possible to keep stuff like that secret. Even if your own front office is completely watertight, other teams can still leak (and its arguably in their interest to do so to drive prices up), and teams can just start figuring things out based on your needs, where your scouts are going, your habits...
Someone's going to start talking about it. Best you can do is give them lots to talk about so they're not sure. But completely hiding it... I just don't see it.
That would be the smokescreen of all smokescreens imo. I think they've been all over that tackle class at the top, and given their lack of depth and lack of interest further down, have kind of locked themselves into acting early.
Fwiw, Ike Taylor has said the mocks aren't too far away from what the Steelers are talking about. Not sure much worth that is given the wide variance of mocks.