More specifically near:

1) Betws y Coed,
2) Machynlleth,
and
3) Nant yr Arian.

Your recent experiences/opinions at campsites near the above venues would be most appreciated.

Hithangyow.

Maybe change the area to North West Wales. 😉

shell island.
http://www.shellisland.co.uk/

D'oh… yep – just realised. North and West, of course…

Been recommended on here many times, Cae Du between Llwyngwril and Tywyn is a lovely site right on the coast which allows camp fires (clicky). Costs £12 a night nowadays for two of us in a tent. No electrics, no pubs nearby, just the views. About 30 mins drive to Machynlleth, 30 mins to CyB.

Alternatively, if you want to be closer to Machynlleth, try Gwerniago. Pub within walking distance. (clicky)

Never camped near Betws or Nant yr Arian, but I would recommend you look at the 'search by map' option (option 2) at http://www.ukcampsite.co.uk to find suitable places (can filter by tent / caravan etc. campfires, pubs nearby etc.)

Torrent Walk at Dolgellau, camp fires on a night time too

if you dont mind it being basic then http://www.dolgam-snowdonia.co.uk/camping.html

never had a problem there