In reply to Hatbat:
> Any thoughts on the Lluest Cwm Bach and Claerddu bothies?
Both are on the small side and both are popular. Claerddu is an Elan Valley Trust bothy, distinguished by a very un-MBA flush loo.
It's surprisingly accessible - 10 mins tops - from a tarmac road and so attracts more than its fair share of the 'can't-or-won't-walk-far' brigade. Lluest Cwm Bach is far less accessible - and is probably the better for it - and consequently popular with the more serious bothyists. There's water right outside the door at Claerddu and you can pitch up at both if they're already full when you arrive.
The walking in the Elan Valley can be boggy in places and almost universally hard going (molinia again) if on untracked terrain or even on less well-used RoWs. However, in relative terms, it's a walk in the park compared to the Rhinogydd further north but harder work than the Brecon Beacons.
If you weren't totally fixated on the notion of a wild camping trip, then there's a 2 day circuit I could suggest that involves mainly walking on forestry tracks and good paths and overnighting in two MBA bothies - namely Nant Syddion and Nant Rhys - in an upland area not far to the NE of the Elan Valley. PM me if you (or the dog!!) want more info on this option.
Dave