One of our favourite spots:
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Lovely spot in Mawddach estuary. Lower camping field allows fires. Upper field if you need hookup. They also have self catering,
Direct access onto Mawddach trail for family rides (good pub a 10 min, traffic free ride away). Nice beaches nearby and plenty of family friendly activities in Barmouth and the like.
Riding is great – it’s possible to ride Cadair Idris from the door, just a short drive to Coed y Brenin. Mach trails are not much further, and loads of other natural options locally. Rest of Snowdonia is all within easy reach too.
John and Sarah are great hosts and can offer loads of advice on stuff to do locally.