Barty seems to think Lamont is competent. Have you misgivings about her capacity to uncover what we need to know? The biggest limitation in my mind is time: She is only one witch, after all.

Of a mind to agree with Cadmus that the less we signal the camps the better. You are correct, of course, that they will hear rumours. Isn't it the job of Communications to control what they hear or do not hear?

Perhaps the answer lies in supplying a credible reason for her (or others') presence in the camps.