In reply to Swain16: Heya John,
Just seen your post. As a general rule, the places to come into condition quickest in Snowdonia are Upper Cwm Glas, Cwm Cneifion or Trinity face area. I've no idea exactly what the conditions are doing, but looking at the webcams and going on past experience of the Welsh winter, I'm guessing cold temps, a thininsh layer of powdery stuff and maybe some ice higher up?
If that is the case, then the gully's probably arn't the best option as they may not be consolidated but I could be wrong. I'd have thought buttress or mixed style routes would be better. Any of the common scrambles would be fun, generally get around grade I / II in winter - N Ridge of Tryfan, Bristly Ridge, Grybin, Snowdon Horseshoe etc are all easy but well worth it under snow. Also, the D/ VD line on the East face of tryfan are apparently doable in snow but probably unpleasant!
You could try the Clogwyny y Person arete in Cwm Glas - that will be snow covered and always goes in the snow. Gets II/III in the guide but can be hard at times.
If it is icy, then Tower Slabs in Cwm Cneifion might go but I doubt this is in condition. Some one else might know.
Looks like the Trinity gullys have been climbed recently. I have no idea what they were like.
Email me if you want any other suggestions and I'll dig the guide out. Cicerone do a Welsh winter guide.
Enjoy! (and no, I'm not jealous at all!)