Okay, Formendacil of the seriously hilarious title...
Yes, I like it. But there's something unsettling about letting the men know for certain-- via messenger-- rather than shadowy suspicions that grow over time-- via dreams and impressions. A growing uneasiness would be less likely to make 2/3 the company turn around and go back. (Ędegard, Liornung, Ravion, Raefindan, Nethwador, Mellondu would all be inclined. Only Taitheneb and Erebemlin would wholeheartedly continue south.)
With a clear message that the women are missing, and the group only out a day or four from the city, all but the elves would go north again-- or be very seriously torn about it. So either we have a bickering and divided company of men, or, we need to delay the news til they can hope to find the women on the south side of the mountains. So I'm thinking the women then have to leave late enough, and Bergil would have to leave late enough, so that it's too late for the men to turn around and go back. So that will stretch the ladies' plot out a bit more, methinks.