In reply to marshexplorer:
Have done the Horseshoe just once, a couple of decades ago. Wild conditions. When I got to Crib Goch, there were about 40 - 60 people just looking at it. Nobody venturing. With decades of soloing, I wandered across. Nobody followed. The rest of the day (almost zero visibility), three people passed me, going the other way. Nobody passed me, in my direction. I've never been a particularly fast walker and, if many had got past Crib Goch, quite a few would surely have passed me. I'm deducing that few, if any, got past Crib Goch.
In terms of a good day out, it was sensory deprivation for most of the way. There was a break in the clouds, for less than five minutes, with the most glorious views. Showed me what I was missing!
As others have suggested, I'd go for something else and save this for a better day. Please don't underestimate Crib Goch. If/when you get on it, if you both feel fine, then OK. But if either of you doesn't feel fine, than bail.
As one of the most wise men in climbing history once remarked, "It'll be there next year. The trick is to make sure you are."
Mick