In reply to ford23:
What you looking to do? Cant really tell from ur post.
Walking? Then get to the carpark leading to Neuadd resevoir and do the horeshoe walk taking in corn du, pen y fan, cribyn and then the gap road back to the carpark. Awesome walk and you'll avoid the crowds for 70% of the route.
Climbing? Not sure what condition the gullies will be in but routes have been done on the north faces in the last week.
If you want to park on/near the storey arms then get there early, itll be rammed by 6.30 am.
Crampons and axe needed Just in case, and decent clothes. Itll be baltic up there.