In reply to ianlaw:
The dead sheep at Gilwern East has gone. The layby for Gilwern East indicated in the Rockfax is the most spacious of the possible parking spots, but can fill up.
Gilwern East is a taller and better crag IMO although there are only a handful of routes at 6a and below there. Loads of 5s at Gilwern Main, the Hindu Kush area is great at that grade, short climbs and they don't look amazing from the floor, but they are surprisingly engaging when you get on them.
A good day can be had by catching the morning sun at Gilwern East and doing
Asteroids (5a) The Plumb (5b) Black Night's Rein (6a) and
Dolphin Snoggin' (6a) then walk around the hill and stay in the sun for some action at Gilwern Main. All the starred routes in the Rockfax are decent, perhaps the pick of the bunch are the contrasting pitches of
Pwll Du Crack (5c) (steep and pumpy) and
Under a Blood Red Sky (5c) (technical and balancy).