In reply to Obi Wan:
Did a bit of this last September:
Moelfre - flat but hard landings (it's all tidal rock platform). Only did easy stuff but it's a bit highball; e.g. the 4c slab felt very bold. Take care with damp/greasy areas. Easy access.
Penmon - some is highball with bad landings (e.g. Summiteering boulder, I ran away), some is sharp, Angler's platform area is more friendly but tidal, can get crowded with fishing folk; spotted seals, porpoises, etc. Tidal. Access is more complicated, Angler's platform probably easiest bit to get to.
Benllech beach - flat sandy landings, quality not great, some areas of doubtful rock stability which are reasonably obvious, but as family friendly as it gets. Ideal for no pad or small pad.